Why Alcohol Grade and Maceration Change Everything
Two invisible variables that separate a harsh blend from a rounded, shelf-stable perfume.
Two formulas can use identical concentrates and smell completely different after three months. The usual culprits are alcohol grade and maceration time.
Alcohol grade
Perfumery alcohol should be odourless, at 96% v/v, with low aldehyde and fusel oil content. Industrial-grade ethanol introduces a sharp, solvent-like top note that no amount of fragrance oil can mask. Always ask for the alcohol specification and a GC report.
Maceration
After mixing, the concentrate needs time to integrate with the alcohol. A minimum of two weeks is standard for an EDP; four to six weeks gives a noticeably rounder opening. Maceration does not fix a bad formula, but skipping it reliably makes a good formula smell unfinished.
Filtration and filling
Cold filtration removes waxes and insoluble matter that can cloud the liquid or clog a pump. Filling temperature and headspace also affect oxidation; a well-run line controls both.
What to ask your supplier
- Alcohol grade and source, with a current certificate of analysis
- Standard maceration time, and whether it can be extended
- Filtration method and clarity standard
- Retained samples from each batch
None of these are visible in a photograph. All of them are detectable by a customer who has bought perfume before.
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