The chill is complete. The formula is stable. Now it is sealed and left to macerate for 12 weeks. This is not waiting. The chemistry is active throughout — and the formula that emerges at week twelve is a measurably different product from the formula that went in.

Maceration is the integration stage. During the 12-week rest, three processes are active in the sealed formula.

First: ester formation — certain aromatic compounds react with the ethanol carrier to form new ester bonds, producing softer, more integrated character within the accord.

Second: fixative bonding — the fixative compounds added at the London blend stage interact with the aromatic materials around them, slowing the evaporation of the heart note tier and extending the drydown's presence on skin.

Third: volatility equilibration — the sharp differential between the high-volatility top note tier and the low-volatility base tier softens as the formula integrates, producing a more coherent transition between acts. None of these processes can be accelerated.

They proceed at the rate the chemistry allows.

WHAT WE DID

The sealed formula macerates in a dark, temperature-stable location at room temperature — 16–18°C is correct. Cold slows the integration chemistry. Heat accelerates evaporation through the seal and degrades the formula. Stable room temperature is the correct environment. The batch is evaluated at 72 hours (directional check), at 4 weeks (integration assessment), and at 8 weeks (pre-filtration read). Each evaluation is brief: the batch is opened, assessed on blotter and skin, and resealed immediately. The maceration is not disturbed beyond these checkpoints. At 12 weeks, the formula is assessed in full and, if it passes, prepared for filtration.

WHAT COMES NEXT

72-hour evaluation — the first post-chill, post-seal directional check. We are not evaluating the finished formula at this stage. We are confirming the chill and blend were executed correctly and that the formula is developing as expected.