:QUOTE [quotetype:personal] A perfume is not a formula. It is a conversation between materials that you arrange and then step back from. :INFO How Natural Perfume Is Structured Natural perfumes are built in three tiers: top notes (what you smell first — citrus, light herbs, 15 to 30 minutes), middle notes (the heart — florals, spices, 2 to 6 hours), and base notes (the foundation — resins, woods, musks, 6 to 24 hours). A balanced perfume contains roughly 15 to 30% top notes, 50 to 60% heart notes, and 10 to 25% base notes dissolved in perfumer's alcohol (ethanol at 90%+ for spray applications). :COUNTER.half 15 to 25 Percent | :COUNTER.half 4 to 6 Weeks :PATH Choose Your Materials Start with 5 to 7 oils across all three tiers — fewer is clearer. | :INFO Choose Your Materials Buy small samples of essential oils from reputable suppliers (Eden Botanicals, Perfumer's Apprentice, Tisserand). Choose 2 top notes (bergamot, lemon, grapefruit, litsea), 2 to 3 heart notes (rose otto, ylang ylang, lavender, neroli, jasmine absolute), and 1 to 2 base notes (vetiver, sandalwood, cedarwood atlas, benzoin, labdanum). Smell each individually before combining. :PATH Build the Accord on Paper Strips Test combinations on scent strips before measuring into a bottle. | :INFO Build the Accord on Paper Strips Dip a perfume blotter in each oil and hold them together to evaluate how they interact. The blend you smell on the strip is not what you will smell on skin or after maceration — but it gives direction. Start with base and heart; add top notes last. Note ratios that work. A simple accord: 3 drops bergamot, 5 drops lavender, 2 drops vetiver on a strip. :PATH Scale Up and Blend in Alcohol Measure drops into a small dark glass bottle with perfumer's alcohol. | :INFO Scale Up and Blend in Alcohol Work at 10ml scale first. Measure your accord ratio as drops into a small dark glass bottle. Add perfumer's alcohol to reach your target concentration (10ml total liquid: 2 to 2.5ml essential oils = 20 to 25% EDP strength). Seal and label with ingredients and date. Swirl gently — do not shake. Store in a dark location. :PATH Macerate and Evaluate Over Weeks Smell weekly — the blend changes significantly over 4 to 6 weeks. | :INFO Macerate and Evaluate Over Weeks Evaluate the blend on a blotter and on skin at 1 week, 2 weeks, and 4 weeks. The initial sharp alcohol note fades. Top notes soften. Base notes that seemed overwhelming at week 1 may be perfect at week 4. Keep notes at each evaluation. Adjust by adding small amounts of underdeveloped notes — never by removing ingredients. :CHECKLIST Starting Materials [ ] Bergamot EO, lavender EO, cedarwood atlas EO [ ] Rose absolute or neroli EO for heart note [ ] Vetiver or sandalwood EO for base [ ] Perfumer's alcohol (Perfumers Apprentice or LorAnn) [ ] Small dark glass bottles (10ml, 30ml) [ ] Perfume blotters/scent strips [ ] Pipettes or dropper bottles for measuring :NOTE Natural Perfume Changes on Skin Essential oils interact with skin chemistry differently on every person. A blend that smells like bergamot and vetiver in the bottle may open into an entirely different character on skin. Always test on skin at the inside wrist for 30 minutes before evaluating the full arc of the fragrance. :QUOTE [quotetype:personal] The blend that smells wrong at week one and perfect at week four was right all along. That is maceration. :LINK https://www.perfumersworld.com/unit-2-blending-techniques.php Perfumers World — Blending Techniques and Accord Building