Diaphonization notes: temperature sensitivity

Trypsin — the enzyme used to digest soft tissue during diaphonization — is a diva. It works between 25°C and 37°C. Below that range, it slows to a crawl and the specimen begins to decompose before it clears. Above that range, the enzyme denatures and you are left holding a jar of expensive protein soup.

Attempt one

Workshop temperature: approximately 19°C. November. Belgium. The specimen sat in the enzyme bath for six days with no visible clearing. On day seven, the tissue began to discolour. The smell confirmed what the colour suggested. The specimen was discarded.

Lesson: the enzyme does not care about your schedule. It cares about thermodynamics.

Attempt two

A heating mat was placed under the jar. Temperature was monitored with a kitchen thermometer. On day three, the mat was accidentally set to 42°C overnight. By morning, the enzyme had denatured and the specimen had partially cooked. The smell was different this time — less decomposition, more Sunday roast. Equally useless.

Attempt three

An aquarium heater. Set to 30°C. Submerged directly in the enzyme bath. Thermostat-controlled. The specimen cleared in nine days. The staining took another four.

The total cost of learning this: two specimens, one heating mat, considerable patience, and the lingering awareness that cooking and chemistry are separated by approximately twelve degrees.