RUŌOD Lab

RUŌOD Lab Academy

Practical exercises and projects

Perfumery is learned with materials in front of you. Each exercise sits inside its lesson, which explains why it works and what can go wrong. Read the lesson first when the exercise involves materials you have not handled.

Level projects

Each level ends with something you made and can show.

All exercises

Level 1: Introduction to Perfumery

  • Take one perfume apart in words

    25 minutes · You will have: a first journal entry describing one fragrance at three points in time · In: What Is Perfumery? The Craft in Plain Terms

  • Smell one material from each era

    20 minutes · You will have: notes comparing an old-style natural and a modern clean smell · In: How New Materials Changed Perfumery

  • Write your own one-page brief

    20 minutes · You will have: a short written brief for a fragrance you would like to be able to make one day · In: How Professional Perfumers Work

  • Time three materials on strips

    30 minutes · You will have: a timed table showing when each of three smells fades · In: Volatility: Why Top, Heart and Base Notes Exist

  • Sort ten smells by family

    40 minutes · You will have: a sorted list of ten fragrances or materials, with a reason beside each · In: Learn the Fragrance Families by Smelling Them

  • Work out what is in the bottle

    15 minutes · You will have: three worked concentration calculations, and a comparison of two strengths on strips · In: Perfume Strength Terms: What EDP and EDT Mean at the Bench

  • Compare a natural and a single molecule

    30 minutes · You will have: a recorded side-by-side comparison of one natural material and one related molecule · In: Natural and Synthetic Materials, Side by Side

  • Level 1 project: set up your journal and write your plan

    40 minutes · You will have: a working journal template and a personal plan for the next eight weeks · In: Your Perfumery Learning Plan and Smelling Journal

Level 2: Olfactory Training

  • Find your nose's blind spots

    20 minutes · You will have: a list of materials you find strong, weak or absent, compared with one other person if possible · In: How Smell Works: What a Perfumer Needs to Know

  • Watch adaptation happen

    15 minutes · You will have: a timed note of how quickly one smell fades with repeated sniffing, and how it returns after a rest · In: Olfactory Fatigue: How to Rest Your Nose

  • A full evaluation of one material

    30 minutes · You will have: one complete material evaluation, with times, in your journal · In: How to Smell Raw Materials on a Strip

  • Start a personal lexicon

    30 minutes · You will have: a lexicon of at least ten words, each tied to a reference smell you can return to · In: Build Your Olfactory Vocabulary

  • Run a dilution ladder

    40 minutes · You will have: a ladder result for one material, showing where you could detect and where you could recognize it · In: Find Your Own Odor Thresholds

  • Run your first recall drill

    20 minutes · You will have: a first scored recall drill, and a review schedule for the next two weeks · In: Odor Recognition Drills That Work

  • Run six triangle trials

    30 minutes · You will have: a scored set of six triangle trials, and a note on whether your score exceeds chance · In: Blind Smelling Practice for Beginners

  • Keep the routine for two weeks

    10 minutes · You will have: two weeks of dated sessions, and evaluations of your starter set of smells · In: A Daily Olfactory Training Routine

Level 3: Raw Materials and Laboratory Fundamentals

  • Classify what you already own

    20 minutes · You will have: a list of every aromatic material you own, sorted by type, with its handling note · In: Perfumery Material Types for Beginners

  • Meet three aroma chemicals on paper

    25 minutes · You will have: reference notes on three aroma chemicals, ready to compare with the real materials · In: What Are Aroma Chemicals? A First Guide

  • Read one real SDS

    30 minutes · You will have: a completed material record drawn from one real safety data sheet · In: Read a Material's CAS Number and SDS

  • Audit your workspace

    20 minutes · You will have: a one-page workspace safety checklist, completed for your own space · In: Safe Handling of Perfumery Materials at Home

  • Hit 1.00 g five times, using water

    20 minutes · You will have: a table of five weighings, your spread, and the size of your drop · In: Your First Weighing Practice

  • Make a 10% and a 1%

    30 minutes · You will have: two labeled dilutions of one material, with their weights recorded · In: Perfume Dilution Basics: Make Your First 10%

  • Set up storage and a stock log

    30 minutes · You will have: your materials stored together, with a stock log showing dates and locations · In: How to Store Perfume Materials

  • The Stage A project: your documented library

    180 minutes · You will have: a labeled, documented library of about twelve materials, each with an evaluation · In: Build a Training Material Library

Level 4: Accord Construction

  • Listen for the moment two become one

    25 minutes · You will have: notes on one pair of materials at three ratios, marking where you stopped hearing two things · In: Accords: Study Guide and First Listening Exercise

  • Three pair studies

    60 minutes · You will have: three recorded two-material studies, each with a judgment on what the pairing is good for · In: Two-Material Accord Studies

  • Find one balance point in two rounds

    60 minutes · You will have: a two-round ladder with a chosen ratio stated in pure material · In: Ratio Ladders: Finding an Accord's Balance Point

  • Build one complement and one contrast

    50 minutes · You will have: two recorded pairings on one base material, with the effect of each described · In: Complementary and Contrasting Odors in Accords

  • Sort one published formula by role

    30 minutes · You will have: one formula's lines sorted into backbone, modifier, blender and effect, with reasons · In: Material Roles: Study Guide and Sorting Exercise

  • Build a rose in four rounds

    90 minutes · You will have: four numbered versions of a rose accord with notes, and one version you can defend · In: Rose Accord Workshop

  • Build a jasmine in four rounds

    90 minutes · You will have: four numbered versions of a jasmine accord, with a ladder result for its indole dose · In: Jasmine Accord Workshop

  • Read three white florals side by side

    30 minutes · You will have: a comparison table of three white floral structures, with one modification proposed for your jasmine · In: White Florals: Study Guide and Comparison

  • Plan a muguet around a restriction

    30 minutes · You will have: a planned muguet accord with a stated source and date for each restriction you checked · In: Muguet Without Lilial: Study Guide

  • Compare ionones with a powdery base

    25 minutes · You will have: a side-by-side note on two ionones, plus a two-material powdery study · In: Powdery Iris and Violet: Study Guide

  • Build a citrus and time it

    90 minutes · You will have: three citrus accord versions, with a timed strip table for each · In: Citrus Accord Workshop

  • Ladder a green note into a floral

    30 minutes · You will have: a low-dose ladder of one green material in one of your floral accords · In: Green and Herbal Modifiers: Study Guide

  • Build a fougère in three rounds

    90 minutes · You will have: three numbered fougère versions, with a recorded decision on moss · In: Fougère Accord Workshop

  • Serial-dilute a marine material

    30 minutes · You will have: a ladder note showing where a strong marine material helps an accord, and where it dominates · In: Aquatic and Airy Effects: Study Guide

  • Build an amber in three rounds

    90 minutes · You will have: three amber versions with a recorded decision on sweetness · In: Amber Accord Workshop

  • Build a woody accord in layers

    90 minutes · You will have: a map of your woods and two layered accords judged over 48 hours · In: Woody Accord Workshop

  • Musk sensitivity test and blend

    75 minutes · You will have: a personal musk sensitivity table and one blended musk accord, checked by a second person · In: Musk Accord Workshop

  • Two chypres, one with moss and one without

    90 minutes · You will have: two chypre accords and a written comparison of what the second gained and lost · In: Chypre Accord Workshop

  • Build a gourmand with a non-food twist

    75 minutes · You will have: a gourmand accord with one stated food reference and one non-food contrast · In: Gourmand Accord Workshop

  • Add a trace of smoke

    30 minutes · You will have: a low-dose ladder of one smoky material in your amber or woody accord, and a reading of one leather structure · In: Leather and Smoke: Study Guide

  • Diagnose one failed accord

    60 minutes · You will have: a written diagnosis of one of your failed accords, with tests and a revised version · In: Accord Troubleshooting: Diagnose What Went Wrong

  • Rewrite one accord from your notes

    30 minutes · You will have: one complete accord record, remade from the record alone to test it · In: Keeping Accord Records That Work

  • The Level 4 project: an accord portfolio

    120 minutes · You will have: a portfolio of at least four documented accords, one of them used inside a simple two-accord blend · In: Using an Accord Inside a Formula

Level 5: Perfume Mathematics and Formula Design

  • Measure the error yourself

    25 minutes · You will have: two density estimates and a calculated error for a one-to-one mixture by volume · In: Weight, Not Volume: Study Guide and Density Check

  • Convert three formulas

    25 minutes · You will have: three worked conversions, each checked against its total · In: Percent and Parts: Study Guide and Drill

  • Write one batch sheet

    25 minutes · You will have: a batch sheet with a weigh column and stock plan for any line under your scale's practical limit · In: Percent to Grams: Study Guide and Batch Drill

  • Work all twelve, then write your own

    60 minutes · You will have: twelve worked problems, and one original problem with its answer · In: Perfume Formula Practice Problems

  • Plan the stocks for a real formula

    40 minutes · You will have: a stock plan for one formula, including the solvent total and a shelf log · In: Stock Solutions in Practice

  • Calculate and finish one concentrate

    35 minutes · You will have: a worked sheet taking one formula to a finished 15% and comparing it with the naive calculation · In: Active Material: The Number Behind Every Formula

  • Switch one dilution three ways

    30 minutes · You will have: three worked versions of one formula after a dilution change, with totals · In: Solvent in a Formula: What It Does to Your Numbers

  • Three shares, four questions

    25 minutes · You will have: a table of the three shares for one formula, and four questions answered with the right one · In: Absolute and Relative Percentage: Study Guide

  • Normalize and compare two versions

    30 minutes · You will have: two normalized versions of one accord, with the lines that changed most marked · In: Normalize a Formula to 1,000 Parts

  • Find your smallest honest batch

    25 minutes · You will have: one formula scaled to three sizes, with the smallest workable batch identified · In: Scaling a Batch: Study Guide and Exercise

  • Solve the drill set

    45 minutes · You will have: ten worked problems, and a note on which type you find hardest · In: Perfume Dilution Practice Problems

  • Audit a flawed batch sheet

    20 minutes · You will have: five errors found in a sample sheet, and a personal pre-weighing checklist · In: Spot a Calculation Error: Study Guide

  • Version your own history

    25 minutes · You will have: a one-page version tree for one accord · In: Formula Versioning: Study Guide

  • Substitute one line in an accord

    60 minutes · You will have: a recorded substitution with two candidates tested blind against the original · In: Material Substitutions: A Controlled Method

  • Hand a formula over

    30 minutes · You will have: one complete formula record, tested by someone reading it cold · In: Documenting a Formula: Study Guide

  • Weigh it twice, smell it blind

    60 minutes · You will have: two batches of one formula, a weighing comparison and a blind test result · In: Reproducibility Test: Weigh It Twice

  • The Level 5 project: one formula, checked twice

    120 minutes · You will have: a formula worked by hand and checked independently, with a batch sheet and reproducibility result · In: Working a Formula in the RUŌOD Lab App

Level 6: Complete Perfume Creation

  • From one sentence to a first draft

    60 minutes · You will have: a one-sentence concept, a smell-target list and a draft structure ready to weigh · In: Translate a Concept Into a Formula

  • Write a one-page brief

    25 minutes · You will have: a one-page brief with stated constraints and success criteria · In: Write Your Own Brief: Study Guide

  • Weigh version 1 and plan version 2

    60 minutes · You will have: a weighed and recorded first draft, and three planned changes in priority order · In: Create a First Formula: Study Guide

  • Write two openings for one heart

    60 minutes · You will have: two openings tested on one heart, with a timed handover note for each · In: Build a Perfume Opening

  • Refine one heart in three versions

    60 minutes · You will have: three heart versions judged at 1 and 4 hours · In: Develop a Perfume's Heart

  • Compare two bases over 72 hours

    45 minutes · You will have: two drydown versions with notes at 6, 24, 48 and 72 hours · In: Design a Perfume's Drydown

  • Find and close one gap

    60 minutes · You will have: a timed strength chart for a formula, one gap identified and a revised version compared · In: Balance Volatility Across a Formula

  • Test carry and cling separately

    45 minutes · You will have: informal diffusion and substantivity notes on three materials, stating the test's limits · In: Diffusion and Substantivity

  • Composition 1: a complete floral

    180 minutes · You will have: a complete floral composition in at least four recorded versions, judged against its brief · In: Compose a Floral Perfume

  • Composition 2: a complete woody

    180 minutes · You will have: a complete woody composition in at least four recorded versions, scored against its brief · In: Compose a Woody Perfume

  • Composition 3: a complete amber

    180 minutes · You will have: a complete amber composition with recorded versions and a chosen working dilution · In: Compose an Amber Perfume

  • Composition 4: a complete citrus

    150 minutes · You will have: a complete citrus composition with a timed comparison against a cologne reference · In: Compose a Citrus Perfume

  • Composition 5: a complete fresh fragrance

    150 minutes · You will have: a complete fresh composition, with its type of freshness defined in the brief · In: Compose a Fresh Fragrance

  • Rewrite an old description

    20 minutes · You will have: one older fragrance description rewritten in plain sensory terms · In: Oriental and Amber: Terminology and History

  • Apply one niche strategy to your own formula

    60 minutes · You will have: one existing composition reworked using a single stated structural strategy · In: Modern Niche Fragrance Structures

  • Three predicted revisions

    45 minutes · You will have: three revisions of one composition, each with a prediction and a result · In: The Revision Loop: Study Guide

  • Audit five compositions

    40 minutes · You will have: a table of five compositions against common mistakes, and one rule for your next formula · In: Composition Mistakes: Study Guide and Self-Audit

  • Paper and nose, on one pair

    45 minutes · You will have: a difference table for two versions, plus blind trial results · In: Compare Two Versions Blind: Study Guide

  • Write and apply a stopping rule

    30 minutes · You will have: a written decision on one composition: finished, paused or abandoned, with reasons · In: When Is a Perfume Formula Finished?

  • Fresh versus rested, blind

    30 minutes · You will have: a blind comparison of one formula's fresh and rested dilutions · In: Maceration: Study Guide and Side-by-Side Test

  • Paper and fabric, side by side

    40 minutes · You will have: a paper and fabric comparison of one composition over 48 hours · In: Evaluate on Strip, Skin and Fabric

  • The Level 6 project: a composition portfolio

    120 minutes · You will have: at least three complete compositions from different families, each with a brief, version history and evaluation sheet · In: Keep an Evaluation Sheet: Level 6 Project

Level 7: Perfume Chemistry and Analytical Methods

  • Read four perfumery molecules

    40 minutes · You will have: worked atom counts for four molecules, each checked against PubChem · In: Reading a Molecular Structure

  • Classify your training library

    40 minutes · You will have: your training library sorted by functional group, with one predicted risk for each · In: Functional Groups: A Working Guide for Perfumers

  • Alcohol versus acetate, and a chain-length walk

    45 minutes · You will have: paired notes on alcohols and their esters, and a chain-length comparison of aldehydes if available · In: Alcohols, Esters and Aldehydes in Practice

  • Compare one lactone pair and one ketone pair

    40 minutes · You will have: structure sketches and smell notes for two related pairs · In: Lactones, Ketones and Macrocycles

  • Test a structure-odor rule on your own materials

    40 minutes · You will have: a tested prediction from a molecular family, marked right or wrong · In: Structure-Odor Relationships

  • Smell a pair of enantiomers

    30 minutes · You will have: a blind test on a carvone pair, or a paper review of two isomer mixtures you own · In: Stereochemistry and Smell

  • Evaluate one receptor claim

    25 minutes · You will have: a short written review of one marketing or popular claim citing smell receptors · In: What Receptor Research Does and Does Not Explain

  • Look up and rank five materials

    35 minutes · You will have: five materials ranked by published vapor pressure, compared with your strip timings · In: Vapor Pressure: The Physics Behind Volatility

  • Diagnose one cloudy dilution

    30 minutes · You will have: a written diagnosis of a hazy sample, or a worked plan for a provided case · In: Polarity and Solubility in Perfume

  • Audit your bench's flash points

    25 minutes · You will have: a table of flash points from SDSs, and one change to how you store or handle things · In: Flash Point in Context: Study Guide

  • Age one oil on purpose

    30 minutes · You will have: a planned aging comparison of a citrus oil, stored two ways over weeks, with results recorded · In: Oxidation and Degradation Pathways

  • Watch a Schiff base form

    20 minutes · You will have: a timed note of color and odor changes in a small reaction mixture · In: Schiff Bases: Study Guide and Color Test

  • Trace a color change

    30 minutes · You will have: a controlled test on one formula, identifying which line or pair changes color over weeks · In: Discoloration Chemistry

  • Write your questions for an analyst

    25 minutes · You will have: a list of questions you would ask before commissioning or trusting a GC-MS report · In: GC-MS Fundamentals: Study Guide

  • Annotate a sample report

    40 minutes · You will have: the sample report annotated with what you trust, what you doubt and what you would ask · In: How to Read a GC-MS Report

  • Flower versus extract

    25 minutes · You will have: a comparison of a real flower or plant with an extract, and notes on what a headspace study would add · In: Headspace Analysis: Study Guide

  • A paper reconstruction

    30 minutes · You will have: a draft formula from a peak list, with each assumption marked · In: Analytical Reconstruction: Study Guide

  • The Level 7 project: a material dossier

    150 minutes · You will have: a dossier on one natural material, linking structure, behavior, published analysis and your own evaluation · In: Correlating Sensory and Analytical Data

Level 8: Performance Engineering and Evaluation

  • A blind distance test on two formulas

    60 minutes · You will have: blinded distance results for two formula versions, with conditions and limitations stated · In: Projection, Sillage and Diffusion: Measuring the Unmeasurable

  • A one-month tenacity log

    30 minutes · You will have: a tenacity log for at least ten materials over a month, with notes on where it disagrees with published statements · In: Longevity and Tenacity: Study Guide

  • Compare a formula at two temperatures

    45 minutes · You will have: a controlled comparison of one formula at room and warmed conditions · In: Bloom: How a Fragrance Opens Up

  • Build an anchored intensity scale

    50 minutes · You will have: a labeled reference scale and a rated dilution series for one material · In: Odor Intensity: Rating Strength Reliably

  • Test one fixative claim

    40 minutes · You will have: a controlled test of one material's claimed effect on one volatile material · In: Fixatives: Study Guide and a Test of the Claim

  • Write a wear test protocol

    40 minutes · You will have: a written protocol covering purpose, participants, dosing, recording and safety gates · In: Design a Wear Test: Study Guide

  • Match tests to questions, then run one

    50 minutes · You will have: five questions matched to tests, plus one small test run and analyzed · In: Comparative Evaluation: Choosing the Right Test

  • Catch your own bias

    30 minutes · You will have: a labeled-versus-blind comparison showing how a label changed your own ratings · In: Evaluation Bias: How You Fool Yourself

  • Draft and critique a questionnaire

    30 minutes · You will have: a one-page questionnaire and a written critique of its weak points · In: Consumer Testing: Study Guide

  • Design and start a stability study

    60 minutes · You will have: a written stability protocol for one formula, with samples set up and the first checkpoint recorded · In: Stability Testing: Study Guide and Study Design

  • Make a stabilizer decision

    25 minutes · You will have: a written decision on one formula, including alternatives and regulatory notes with dates · In: Antioxidants and UV Absorbers: Study Guide

  • Diagnose a stability result

    40 minutes · You will have: a written diagnosis and follow-up plan for your own study or the worked case · In: Interpreting a Failed Stability Test

  • One concentrate, two carriers

    45 minutes · You will have: a timed comparison of one concentrate in alcohol and in an oil carrier · In: Carrier Effects: What the Solvent Does to a Fragrance

  • Plan a fair between-wearer comparison

    30 minutes · You will have: a written plan for a comparison, with safety gates and a way to separate wearer from smeller · In: Skin Interactions: What We Know and What We Don't

  • A three-fiber retention test

    40 minutes · You will have: a one-week retention table across three fibers, with a stain record · In: Fabric Interactions: A Controlled Test

  • The Level 8 project: a performance study

    180 minutes · You will have: a written performance study on one formula: question, method, results, limits and next steps · In: Adapting to a Product Base: Level 8 Project

Level 9: Modern and Experimental Perfumery

  • Design a skin-scent structure

    75 minutes · You will have: a three-musk structure evaluated by at least two people · In: Modern Musks in Practice

  • A woody amber ladder in a simple base

    60 minutes · You will have: a ladder of two woody ambers in one base, with the point of harshness marked · In: Woody Amber Materials

  • Build one sheer floral

    75 minutes · You will have: a transparent floral draft with a record of what was removed and why · In: Transparent Floral Structures

  • Audit your wish list

    25 minutes · You will have: a wish list with availability, supplier documents and alternatives for each material · In: Captive Molecules: Study Guide

  • A trace material in a known accord

    70 minutes · You will have: a dilution chain and a blind comparison of a trace in an accord · In: High-Impact Aroma Chemicals

  • An overdose ladder

    60 minutes · You will have: a four-step ladder with one material from its usual share to a deliberate excess · In: Overdose Technique: Study Guide

  • A ten-material formula

    90 minutes · You will have: a short formula in which every material has passed a removal test · In: Minimalist Perfumery

  • Restructure a dense formula

    90 minutes · You will have: one long formula regrouped into sub-accords, with a tested revision · In: Complex Compositions

  • A claim check on one biotech material

    45 minutes · You will have: a one-page note separating supplier claims, evidence and what you tested yourself · In: Biotechnology-Derived Ingredients

  • A sourcing note on one material

    45 minutes · You will have: a sourcing note covering origin, legal status, evidence and open questions · In: Sustainable Ingredient Innovation

  • Write a full material card

    90 minutes · You will have: a material card with documents, time course, accord tests and a dose range · In: Evaluating an Unfamiliar Material

  • One deliberate rule-break

    90 minutes · You will have: one composition that breaks a stated convention, with blind reactions recorded · In: Contemporary Creative Techniques

  • Audit one AI answer

    45 minutes · You will have: a marked-up AI answer in which every factual claim is verified, corrected or struck out · In: AI in Perfume Research and Formulation: Uses and Limits

  • Level 9 project: an experimental composition

    240 minutes · You will have: an experimental composition, an experiment record and a written rationale · In: Designing a Fragrance Experiment

Level 10: Safety, IFRA, Regulatory Compliance and Quality

  • Look up three Standards

    40 minutes · You will have: a dated lookup table for three materials, with the source for each · In: IFRA Standards: Study Guide

  • Place eight products

    35 minutes · You will have: eight products placed in IFRA categories, with the guidance section cited for each · In: IFRA Categories and QRA: Study Guide

  • Restriction check on your own formula

    60 minutes · You will have: a line-by-line check of one of your formulas, with the limiting line named · In: Checking a Formula Against a Restriction: Study Guide

  • Your amendment watch process

    45 minutes · You will have: a one-page review process and an index of formulas by restricted material · In: Amendment Awareness

  • Audit one certificate

    25 minutes · You will have: a filled-in audit of one real certificate, with questions for its issuer · In: IFRA Certificates: Study Guide

  • Trace allergens through one formula

    45 minutes · You will have: a table of allergen contributions and a provisional declaration list · In: Fragrance Allergens: Study Guide

  • Audit the citrus in one formula

    40 minutes · You will have: a phototoxic-material audit of one formula, with its sources and dates · In: Phototoxicity: Study Guide

  • Critique three testing claims

    25 minutes · You will have: three claims marked with what each test would and would not show · In: Patch Testing and Its Limits: Study Guide

  • A checklist for one market

    40 minutes · You will have: a dated regulatory checklist for one market, with a source for each line and a list of questions for a professional · In: Perfume Regulations by Market: Study Guide

  • MoCRA duties for one brand

    30 minutes · You will have: a duties table for one brand, with sources and open questions · In: United States, MoCRA: Study Guide

  • An EU route for one perfume

    35 minutes · You will have: a route map from formula to first EU sale, with each document, owner and source · In: European Union: Study Guide

  • Compare two routes

    25 minutes · You will have: a comparison of the EU and Great Britain routes, showing what can be reused and what cannot · In: United Kingdom: Study Guide

  • Assemble an assessor pack

    60 minutes · You will have: a document pack index for one perfume, each entry marked held, requested or missing · In: What a Safety Assessor Needs: Study Guide

  • Review one fragrance oil's documents

    35 minutes · You will have: a review of one SDS and label, with any inconsistencies noted · In: SDS and CLP for Fragrance Oils: Study Guide

  • Write a one-page spec

    45 minutes · You will have: a one-page specification with measures, methods and acceptance ranges · In: Finished Product Specification: Study Guide

  • Write and use a goods-in routine

    40 minutes · You will have: a goods-in routine and one completed record · In: Incoming Quality Control: Study Guide

  • A mock recall

    45 minutes · You will have: a timed trace from one finished batch to its input lots and recipients · In: Batch Traceability: Study Guide

  • Level 10 project: a compliance review

    240 minutes · You will have: a compliance review of one formula, marking each item checked, open or for a qualified person · In: Running a Compliance Review

Level 11: Commercial Fragrance Development

  • Map one project

    35 minutes · You will have: a stage map of one project, with inputs, outputs and gates · In: The Development Workflow: Study Guide

  • Dissect a mock brief

    45 minutes · You will have: an annotated brief, a questions list and a one-page interpretation · In: Reading a Brief

  • Write a one-page scope

    45 minutes · You will have: a one-page scope with deliverables, revisions, ownership and exclusions · In: Client Requirements and Scope

  • Cost one of your formulas

    45 minutes · You will have: a line-by-line costing with concentrate and per-bottle figures · In: Calculating Formula Cost: Study Guide

  • Cut 20% from one formula

    90 minutes · You will have: a costed, blind-tested version of a formula at about 20% less cost · In: Reducing Cost Without Losing Character: Study Guide

  • A supply plan for one formula

    50 minutes · You will have: a supply table for one formula, with risks and second sources marked · In: Ingredient Sourcing: Study Guide

  • Trial a second source

    60 minutes · You will have: a trial record comparing two sources in material and in formula · In: Supplier Quality: Study Guide

  • Remove one material and rematch

    180 minutes · You will have: a reformulated version, with a match test and a change record · In: Reformulation Exercise

  • A handover pack and cold read

    60 minutes · You will have: a handover pack, and a list of questions raised when someone else read it · In: Manufacturing Considerations: Study Guide

  • A candidate comparison sheet

    40 minutes · You will have: a question list and a comparison sheet with your weighting · In: Choosing a Contract Manufacturer: Study Guide

  • A stability gate for one project

    45 minutes · You will have: a one-page gate with criteria, timing, owner and a sign-off record · In: Stability as a Commercial Gate

  • Track one project's mods

    40 minutes · You will have: a coding scheme and a mod log with samples, recipients and feedback · In: Mods and Sample Tracking: Study Guide

  • A small test for one decision

    90 minutes · You will have: a one-page plan, a short data table and a report of what it does and does not show · In: Consumer Research for a Brief

  • Position one fragrance

    60 minutes · You will have: a positioning statement, a competitor map and a claims check · In: Product Positioning

  • Run a mock presentation

    75 minutes · You will have: a one-page presentation plan, a mock run with someone playing the client and a feedback record · In: Professional Presentations

  • Level 11 project: a brief response

    300 minutes · You will have: a response to a mock brief within a stated cost, with at least two recorded revision rounds · In: Handling Client Revisions

Level 12: Professional Portfolio and Capstone

  • Capstone evidence file

    180 minutes · You will have: a capstone evidence file with sources, material studies and open questions · In: Independent Fragrance Research

  • A capstone concept and sketches

    120 minutes · You will have: a concept page, three quick sketches and notes on what others perceived · In: Concept Development

  • At least six logged versions

    300 minutes · You will have: a capstone formula with at least six logged versions and a stated stopping reason · In: Formula Design and Iteration Log

  • Evaluate the capstone

    240 minutes · You will have: a one-page plan and a results table with an honest conclusion · In: Evaluation Plan

  • A full capstone costing

    90 minutes · You will have: a unit cost sheet at two batch sizes, with sources and a sensitivity check · In: Cost Calculation for the Capstone

  • Capstone review and status note

    120 minutes · You will have: a compliance review of the final version and a one-paragraph status note · In: Regulatory Review for the Capstone

  • Assemble the capstone file

    90 minutes · You will have: a complete capstone file with an index, tested by someone else · In: Technical Documentation: Study Guide

  • A first portfolio

    150 minutes · You will have: a portfolio with three to five pieces, each with role, evidence and limits stated · In: Portfolio Preparation

  • The capstone case study

    180 minutes · You will have: a case study of up to 1,200 words, checked against your records · In: Write a Professional Case Study

  • Audit your formula rights

    35 minutes · You will have: a table of your formulas, who could claim each, what evidence exists and what to ask a lawyer · In: Who Owns Your Formulas: Study Guide

  • Level 12 project: complete the capstone and plan

    120 minutes · You will have: a finished capstone file, a case study and a twelve-month plan · In: Next Steps and Formal Training Routes

Specialist track: Analytical Perfumery

  • Compare one oil on two published methods

    60 minutes · You will have: a comparison table of one material's published results on two column types, with differences explained · In: How a GC Column Separates a Fragrance

  • Compare three published spectra

    60 minutes · You will have: notes on three spectra, with what distinguishes them and what cannot · In: Reading a Mass Spectrum

  • Five retention index problems

    45 minutes · You will have: five calculated indices with published comparisons and a confidence note · In: Retention Indices and Identification

  • Correct a report with response factors

    45 minutes · You will have: a corrected table from invented data, and a note on what a real calculation would need · In: Quantification Limits: What Area Percent Means

  • Audit a report for doubtful identifications

    60 minutes · You will have: a marked-up report listing doubtful peaks, why and which test would resolve each · In: Coelution, Isomers and False Identifications

  • Compare a report with a reference range

    60 minutes · You will have: a compound-by-compound comparison, with findings marked consistent, unusual or unknown · In: Fingerprinting Natural Materials

  • A paper review and a bench analogy

    75 minutes · You will have: a one-page review of a GC-O paper, and a dilution-to-threshold study on strips · In: Gas Chromatography-Olfactometry

  • A method choice with reasons

    45 minutes · You will have: a written method recommendation for two sampling problems, with stated biases · In: Headspace Sampling Methods Compared

  • Final project: an analytical dossier

    480 minutes · You will have: a dossier of up to eight pages on one natural, from published and supplier data · In: Specialist Project: An Analytical Dossier

Specialist track: Molecular Perfumery

  • A musk family structure sheet

    60 minutes · You will have: a structure comparison across four families, with a sensory note and open questions · In: The Musk Problem: Many Structures, One Odor

  • A sandalwood analogue comparison

    60 minutes · You will have: a structure sheet and a smelling table for at least two sandalwood materials · In: Sandalwood Odorants

  • An ambergris family sheet

    60 minutes · You will have: a family sheet with structures, enantiomer notes and a smelling comparison · In: Ambergris-Type Odorants

  • Read one study and test your own discrimination

    75 minutes · You will have: a study summary and a triangle test with a chiral pair, or a stated substitute · In: Enantiomers in Depth: What the Evidence Shows

  • A panel difference study

    75 minutes · You will have: a small table of perceived intensity for three materials across people, with a note on what it can't show · In: Receptor Genetics and Individual Differences

  • Evaluate one prediction claim

    60 minutes · You will have: a one-page assessment of a prediction paper or tool, including what it tested and what it left out · In: Predicting Odor from Structure

  • Mixture identification and convergence tests

    90 minutes · You will have: results from a coded identification test and a many-component comparison · In: Mixture Perception

  • Final project: a structure-odor review

    480 minutes · You will have: a review of up to 2,500 words, with a structure table and a full reference list · In: Specialist Project: A Structure-Odor Review

Specialist track: Creative Mastery

  • Reduce one formula by half

    240 minutes · You will have: a reduction record from a full formula to about half its lines, with blind tests at each stage · In: Reduction: The Fewest Materials That Still Work

  • A six-part variation series

    240 minutes · You will have: six related mods, with a design grid, an evaluation grid and a written finding · In: Variation Series

  • Two constraint assignments

    240 minutes · You will have: two complete compositions under different constraints, each with a short critique · In: Composing Under Constraint

  • An analysis and an original response

    240 minutes · You will have: a written analysis of one fragrance and an original composition responding to one of its ideas · In: Studying a Fragrance Without Copying It

  • A formula audit and a recognition test

    180 minutes · You will have: a usage table across your formulas, a coded recognition test and a one-page statement · In: Finding a Signature

  • Three written critiques

    150 minutes · You will have: three critiques using the framework, one of your own work, one commercial and one by a peer · In: A Framework for Structured Critique

  • Revise a library formula

    180 minutes · You will have: one reviewed formula, with a change proposal, tests and a note to its imagined author · In: Revising Other People's Work

  • Final project: a three-part collection

    720 minutes · You will have: three compositions, a written account of each decision and an outside structured critique · In: Specialist Project: A Three-Part Collection

Specialist track: Research and Innovation

  • A research question file

    90 minutes · You will have: one question, refined through three drafts, with variables, measures, a preliminary literature check and a feasibility note · In: From Curiosity to a Testable Question

  • Appraise one paper and one headline

    90 minutes · You will have: a one-page appraisal of a paper and a comparison with one news or marketing claim citing it · In: Reading Fragrance Research Critically

  • A complete test design with a dry run

    90 minutes · You will have: a design sheet with a randomized allocation table, a key held by someone else and a dry-run report · In: Controls, Randomization and Blinding

  • Plan the numbers for your study

    75 minutes · You will have: a statistical plan with a critical value, a power estimate and worked reporting sentences · In: Sample Size and Sensory Statistics

  • An ethics sheet for your study

    60 minutes · You will have: a consent form, a participant information sheet, a risk list and a stop rule · In: Ethics of Testing on People

  • Build a data file and check it

    75 minutes · You will have: a raw data sheet, a data dictionary, a dated plan and a reproduced summary from a dry run · In: Recording and Sharing Data

  • Rewrite and report

    90 minutes · You will have: ten rewritten overclaims and a one-page results section from your dry-run data · In: Writing Up Without Overclaiming

  • Final project: a small study

    720 minutes · You will have: a dated plan, raw data, a report of up to 2,000 words and an outside check · In: Specialist Project: A Small Study

Specialist track: Industrial and Functional Fragrances

  • Predict, then smell, in two bases

    90 minutes · You will have: a logP table for ten materials, partition estimates and a smelling test in two simple bases · In: Partitioning and Release in Functional Products

  • A survival prediction for one formula

    75 minutes · You will have: a line-by-line risk table and a written test plan for a chosen base · In: Chemical Survival in Harsh Bases

  • A soap adaptation plan

    90 minutes · You will have: an adapted formula plan with a screening table and a trial design · In: Soap and Alkaline Systems

  • A wash-cycle thought experiment and a fabric test

    90 minutes · You will have: a stage table for one formula and a comparison on rinsed fabric swatches · In: Laundry and Fabric Care

  • A clarity and viscosity ladder

    90 minutes · You will have: a ladder in a simple base, recording clarity, flow and bloom at three doses · In: Shampoo, Shower and Surfactant Systems

  • A diffuser evaporation curve

    120 minutes · You will have: weight-loss and odor logs over two weeks for a small reed diffuser test · In: Candles and Air Care Engineering

  • A dose and cost matrix

    75 minutes · You will have: a matrix for two fragrances at three doses, with cost and performance results · In: Dose, Cost and Performance Trade-Offs

  • Final project: an adaptation plan

    600 minutes · You will have: an adaptation plan for two bases, with risk tables, adapted formulas, a test plan and a checklist of what remains · In: Specialist Project: One Fragrance, Two Bases

Specialist track: Regulatory and Quality Specialization

  • Build the skeleton of a file

    120 minutes · You will have: a file index with owners and review dates, plus a change-impact matrix · In: Building a Fragrance Compliance File

  • A contribution table for one formula

    90 minutes · You will have: a contribution table with sources, worst-case figures and a list of questions for suppliers · In: Constituents of Naturals in Restriction Checks

  • An allergen worksheet for one product

    90 minutes · You will have: a worksheet with contributions, thresholds, a provisional list and an action for each data gap · In: Allergen Calculation in Depth

  • A release decision on one batch

    120 minutes · You will have: a specification with data-based ranges and a completed release record · In: Specifications and Release Testing

  • Write up one real or simulated deviation

    75 minutes · You will have: a deviation record with containment, root-cause analysis and corrective and preventive actions · In: Deviations and Corrective Action

  • A GMP gap check

    120 minutes · You will have: a gap table for your workspace, three prioritized actions and two written procedures · In: GMP Thinking for Small Makers

  • A three-market matrix

    150 minutes · You will have: a dated matrix for three markets, with sources, gaps and a work estimate · In: Building a Market Requirements Matrix

  • Final project: a compliance and quality file

    720 minutes · You will have: a quality manual, a compliance file for one fragrance, three drill reports and an outside reading · In: Specialist Project: A Compliance and Quality File

Mastery course: Advanced Perfumery Chemistry

  • Predict a headspace, then compare it with published data

    120 minutes · You will have: a worked prediction of vapor composition for a three-material blend, compared with a published headspace analysis, with each disagreement explained · In: Raoult's Law and the Headspace of a Perfume

  • Model a drydown, then test it on blotters

    180 minutes · You will have: a predicted order and relative lifetime for four materials, compared with your own timed blotter observations at two temperatures · In: Evaporation Thermodynamics: Clausius–Clapeyron at the Blotter

  • Rank an accord by OAV, then test the ranking by omission

    150 minutes · You will have: an OAV table for a four-material accord, an omission test of the top two, and a written comparison of the two rankings · In: Odor Activity Values: From Concentration to Impact

  • Audit an accelerated-aging claim

    90 minutes · You will have: a written audit of one accelerated stability statement, with the acceleration factor recalculated for three activation energies and a list of what the test cannot show · In: Autoxidation Kinetics and Accelerated Aging

  • Separate equilibrium from oxidation in a macerating sample

    120 minutes · You will have: a four-sample maceration design (dry and wet ethanol, with and without air) for one aldehyde, its prediction, and a dated observation log · In: Equilibria in the Bottle: Acetals, Schiff Bases and Esters

  • Rationalize five reference spectra

    120 minutes · You will have: five annotated reference spectra from the NIST WebBook, each base peak and one other ion explained by a named mechanism · In: Fragmentation Mechanisms in Terpenoid Mass Spectra

  • The Advanced Perfumery Chemistry project

    1200 minutes · You will have: a dossier of about 3,000 words on one material in one formula: data, predictions, tests, results and limitations · In: Mastery Project: A Physical-Chemistry Dossier

Mastery course: Advanced Mathematics and Statistics for Perfumers

  • Solve a premix formula three ways

    120 minutes · You will have: the weights for a five-stock formula solved by hand, in a spreadsheet and in Python, with the back-multiplication check · In: A Formula as a Linear System

  • Optimize one accord, then smell the optimum

    150 minutes · You will have: a linear program for an accord of three or four materials, its solution by hand or solver, the shadow price of one constraint, and a blinded comparison of the optimum with the original · In: Optimization Under Constraints: Cost and Composition

  • Run a seven-point simplex-centroid on one accord

    240 minutes · You will have: seven blinded panel ratings of a three-component accord, a fitted Scheffé model, its centroid prediction against the measured centroid, and a contour sketch · In: Mixture Designs for Accords

  • Plan and analyze a reformulation test with d′

    180 minutes · You will have: a test plan stating the method, d′ of concern and sample size, the analysis of a run test with binomial p-value, proportion of discriminators and d′, and a decision statement · In: Discrimination Tests and Thurstonian d′

  • Write an uncertainty budget for your own batch

    120 minutes · You will have: an uncertainty budget for one formula batch, line by line, with the dominant contributions identified and one change that would halve the largest · In: Measurement Uncertainty in Weighing and Dilution

  • Map six fragrances from your own panel

    240 minutes · You will have: a descriptor table for six samples from at least five assessors, a PCA (spreadsheet or Python), a score plot and a written interpretation with its limits · In: Regression and Principal Component Analysis of Panel Data

  • The mathematics course project

    1500 minutes · You will have: a pre-registered plan, the raw data, the analysis code or spreadsheet, and a report of about 3,000 words · In: Mastery Project: A Statistical Study of One Accord

Mastery course: Software and Computational Perfumery

  • Normalize your own library into five tables

    150 minutes · You will have: five CSV tables (materials, stocks, formulas, lines, versions) holding at least ten materials and two versions of one formula, with a data dictionary · In: A Data Model for Formulas and Materials

  • Make the program agree with two other calculations

    150 minutes · You will have: a tested Python script for one of your formulas, its output, and a three-way comparison with a hand calculation and a spreadsheet or the app · In: Fragrance Calculations in Python, Checked

  • Diff five versions of one formula

    120 minutes · You will have: a diff report for each consecutive pair among five versions of one formula, each change linked to its reason in your iteration log · In: Diffing Formula Versions

  • Descriptors against your own blotter data

    180 minutes · You will have: a table of descriptors for ten materials beside your measured blotter lifetimes, a correlation for two descriptors, and a written interpretation with its limits · In: Molecular Descriptors for Odorants

  • Critique one odor-prediction claim

    150 minutes · You will have: a two-page structured critique of one published paper, preprint or product claim, answering the validation questions in this lesson · In: Validating Odor-Prediction Models

  • Rebuild your library in the app, then audit it

    120 minutes · You will have: a library of at least twenty materials in two or more collections, one permanent custom field, one calculated field, and an audit note comparing the app's records with your own tables · In: RUŌOD Lab Tutorial: Materials, Collections and Fields

  • Predict, apply, verify

    120 minutes · You will have: for one formula, a written prediction and a recorded app result for each dilution method and each scaling operation, with every figure checked by hand or script · In: RUŌOD Lab Tutorial: Dilution Methods, Scaling and Targets

  • A versioned development record in the app

    120 minutes · You will have: one formula developed through four duplicated versions with reasons, the final version locked, two versions exported and diffed externally, and one report · In: RUŌOD Lab Tutorial: Versions, History, Reports and Exports

  • The computational course project

    1200 minutes · You will have: a folder of CSV tables, a tested script with its output, diffs of every version pair, a descriptor table, a model critique and a README of about 1,500 words · In: Mastery Project: A Reproducible Computational Record

Mastery course: Creative Master Perfumery

  • Map and stress-test an architecture

    300 minutes · You will have: one composition of your own rewritten as three to five named sub-accords, a role table, and omission results for each sub-accord · In: Advanced Accord Architecture

  • Three single-variable series

    300 minutes · You will have: three variation series of one accord, each changing only texture, contrast or diffusion, with operational definitions and blind ranking results · In: Texture, Contrast and Diffusion as Design Variables

  • Classify the interactions in one accord

    240 minutes · You will have: pairwise interaction tests for four materials of one accord, each pair classified with its evidence · In: Ingredient Interactions in Complex Mixtures

  • Answer a complex brief with a differentiation map

    360 minutes · You will have: a brief analysis, a map of eight to twelve existing fragrances in the territory, two contrasting concept directions with trial formulas, and a one-page rationale · In: Originality, Signature and the Luxury Brief

  • Reconstruct one natural material from published data

    480 minutes · You will have: a reconstruction of one essential oil or absolute built from a published analysis, its hypothesis log, omission results and a comparison with the real material · In: Reconstruction as a Research Method

  • The creative mastery project

    3000 minutes · You will have: a finished composition, its mod tree of at least twelve modifications with hypotheses and evaluations, its architecture record, a differentiation map and an outside critique with your response · In: Mastery Project: A Signature Composition and Its Mod Tree

Mastery course: Elite Professional Practice

  • Act as your own evaluation department

    240 minutes · You will have: a benchmark set, an internal brief for a perfumer (yourself or a colleague), a submission selection with written reasons, and a client-facing summary · In: Evaluation in Fragrance-House Development

  • Qualify one material from two suppliers

    300 minutes · You will have: a specification for one material, a document check of two suppliers' paperwork, a blind olfactory comparison against your standard, and a qualification decision with reasons · In: Supplier Qualification and Raw-Material Specifications

  • Compare two concentrates in use

    120 minutes · You will have: a cost-in-use comparison of two versions of one fragrance at their working doses, with break-even dose, losses and hidden costs, and a recommendation · In: Formula Economics: Cost in Use

  • Write a compounding instruction for one formula

    180 minutes · You will have: a compounding instruction for one of your formulas at a stated production size: tolerances, order of addition, conditions, release tests and records · In: Industrial Compounding and Scale-Up

  • Audit how one of your formulas is protected

    120 minutes · You will have: a confidentiality audit of one formula: who has access, in what form, under what agreement, what a GC-MS analysis would reveal, and three improvements · In: Confidentiality, Trade Secrets and What Protects a Formula

  • Lead one small creative round

    300 minutes · You will have: a brief to at least one other perfumer, a recorded critique session, a decision log and a submission dossier for the selected work · In: Creative Leadership and the Professional Submission

  • The mastery capstone

    6000 minutes · You will have: a research question and plan, the study's data and code, a creative outcome where the question involves one, and a report and submission of about 5,000 words · In: Mastery Capstone: An Original Fragrance Research Project