Four weeks into maceration. The formula smells different from the 72-hour read. The ethanol has begun to integrate with the aromatic concentrate and the fixatives. The three acts are readable for the first time. This evaluation tells us whether the batch is tracking as briefed.

The 4-week evaluation is the most diagnostically useful assessment point in the maceration. By this stage, the ester formation between the ethanol carrier and the aromatic compounds is well underway. The fixative system — added at the London blend stage — has begun to anchor the base and slow the departure of the heart note tier. The sharp edges of individual materials have started to soften into the accord structure around them. The three acts are now readable in a form that, while not yet fully integrated, gives a reliable directional indication of where the formula is going. Crucially, there is still time to note adjustments for the next batch development cycle if the evaluation reveals a problem.

WHAT WE DID

At 4 weeks, the batch is evaluated on blotter and skin using the same protocol as the 72-hour check. We assess Act 2 coherence specifically: is the heart of the formula reading as the brief specified, or is a dominant material distorting the accord? We assess Act 3 presence: is the base anchoring correctly, warm and sustained without being heavy? We assess Act 1 character: is the opening reading as intended, or has the top note material integrated into the formula faster than expected due to its interaction with the ethanol? Each question has a specific answer. The answers shape the 8-week evaluation criteria and inform future formula decisions.

WHAT COMES NEXT

Filtration — at 12 weeks, the fully macerating formula is filtered for clarity and stability before bottling. This is the final production stage before the formula goes into the bottle by hand.