A minimalist graphic with a white background and black text reading: BATCH LOG/005, followed by the word CHILLING in bold, stacked below it.

The −89°C Chill — Stability Before Maceration

Before the formula macerates, it is chilled to −89°C. This is not a standard production step in most commercial perfumery. It is how we remove every wax precipitate and unstable compound from the blend before the 12-week integration process begins — so that what macerates is clean, stable, and complete.

When a perfume formula containing natural aromatic materials is first blended, it carries within it a range of compounds at varying levels of solubility in the ethanol-water carrier. At room temperature, some of these — primarily waxy esters, high-molecular-weight resinous compounds, and certain terpene derivatives — remain in solution or in fine suspension. At extreme cold, they lose their solubility and precipitate out of the formula as visible solids or dense cloudy aggregates. Chilling to −89°C drives this process to completion: every compound that will ever precipitate from this formula does so now, before maceration begins. The precipitates are then removed. What remains in solution is the formula in its stable form — the version that will macerate correctly and remain clear in the bottle.

A black and white line drawing of a small, capped glass bottle containing sharp, star-like crystalline shapes, representing the waxy precipitates that form when a perfume formula is chilled to extreme temperatures. Below the illustration, bold text reads: CHILLED/FILTERED/MACERATED.

WHAT WE DID

After the London blend is completed, the sealed formula is brought to −89°C and held at that temperature for the required duration. On removal from the chill, the precipitated material — wax compounds, unstable resinous particles — is visible as a solid or semi-solid mass separated from the clear formula above it. The clear formula is separated from the precipitate and confirmed stable. This chilled, cleaned formula is now ready for maceration. The 12-week clock starts from this point. The chill is not maceration. It is the preparation that makes maceration effective.

A black and white line drawing of two hands working at a table. The top hand tilts a small vial, pouring a stream of liquid into a conical paper filter resting inside a funnel. The bottom hand gently holds the edge of the filter paper in place. The funnel sits inside a glass measuring beaker marked '100ml'. In the bottom right corner is the edpclub® logo with the text "THE LONDON BATCH PERFUMERY" below it.

WHAT COMES NEXT

Maceration — 12 weeks of sealed rest in which the chilled, cleaned formula undergoes full chemical integration. This is the longest stage. It is also the stage that determines the formula's final depth and coherence.

Back to blog