Reference library

Coffee roasting articles

Ten articles covering the concepts behind the numbers: how a roast develops, what first crack means, how to taste what you made, and how to keep the machine safe and consistent.

All articles

Roasting9 min read

Understanding First Crack and Development Time

What is actually happening inside the bean at first crack, why development time ratio matters, and how to use DTR without becoming its prisoner.

Theo Nakamura January 22, 2026
Green Coffee8 min read

Green Coffee Storage: Keeping Beans Fresh

Green coffee is a living product. Here is how moisture, temperature and light quietly change it, and what actually slows the drift.

Mara Ellis February 3, 2026
Maintenance9 min read

How to Clean and Maintain Your Roaster

A practical cleaning schedule covering chaff, oil build-up, ducting and the fan, plus the fire risks that accumulate when maintenance slips.

Ines Duarte March 5, 2026
Roasting7 min read

Moisture Loss and Roast Weight Explained

Why roasted coffee weighs less than green, how to calculate roast loss, and what a sudden change in that number is telling you.

Mara Ellis March 12, 2026
Roasting10 min read

Troubleshooting Common Roast Defects

Scorching, tipping, baking, underdevelopment and the rest - what each defect looks like, what causes it, and how to correct it.

Theo Nakamura March 26, 2026