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Roasts 107 & 108: A Cold/Warm Swiss Water Decaf Pair That Stayed Lighter Than Expected
These two roasts were planned as a useful comparison pair. Same coffee.Same machine.Same batch size.Same target temperature.Different start state. The coffee was REDBER Colombia Swiss Water…
Coffee Water Calculator — Beta
ORAT tool · brewing water Coffee Water Calculator A practical calculator for building repeatable brewing water from low-mineral water and simple mineral additions. Beta Recipe helper…
Roast 103: First Swiss Water Decaf on the Restored Heater
REDBER SWP Decaf Personal Gene Café CBR-301 | Restored-heater phase | Personality 3 This roast was the first decaf I have roasted on the restored-heater version…
Reference Roast Colombia Swiss Water Process Decaf – Gene Cafe CBR 301
This video looks at Reference Roast Colombia Swiss Water Process Decaf – Gene Cafe CBR 301. Before roasting this coffee, I wanted to show something interesting.
Roast 48 – Colombia SWP Decaf (Swiss Water Process) | Personal Roast
This roast was carried out as a simple personal roast intended for home espresso. The coffee was a Colombia Swiss Water Process (SWP) decaf, and the…
Roast 41 – Colombia Swiss Water Process Decaf
First Decaf Roast on the Gene Café CBR-301 After more than forty roasts on the Gene Café CBR-301, Roast 41 marks the first time decaffeinated coffee…
How Coffee Gets Its Price, From the Farm Gate to the C Market and Specialty Coffee
UNDERSTANDING COFFEE · ECONOMICS How Coffee Gets Its Price, From the Farm Gate to the C Market and Specialty Coffee Coffee pricing confused me for a…
Coffee Roasting Thermodynamics – A Beginner’s Attempt to Understand What Is Actually Happening
Coffee roasting thermodynamics: a beginner’s attempt to understand heat While researching the move from my Gene Café CBR-301 to the Kaleido M2, I kept coming across…
Coffee Fermentation Isn’t Good Microbes vs Bad Microbes
UNDERSTANDING COFFEE · MICROBES & FERMENTATION A better way to understand coffee fermentation is as a changing ecosystem. When I first started trying to understand fermentation,…
Microbes & Fermentation
UNDERSTANDING COFFEE → MICROBES & FERMENTATION Microbes & Fermentation Yeasts, bacteria, changing environments and the surprisingly complicated biology between coffee fruit and green bean. Fermentation makes…
Around the Bean — Coffee Signals Worth Watching, 31 May 2026
A field note on coffee, from crop to cup. A short opening note The coffee world today feels a bit like a handful of threads rather…
Four Personal Roasts: Sweetness, Decaf, and an Awkward Pacas Lesson
Date: 25 May 2026 This was a small personal roasting session on the Gene Café CBR-301, aimed mainly at coffees for pour-over and Fellow Aiden brewing.…
A few places to start
First crack · Cold and warm starts · Water · Coffee pricing · All articles
For a roast record, try its number, coffee name, origin or process. For orientation, visit Start Here. The Roasting path follows Beginner → Intermediate → Advanced; Understanding Coffee lets you explore subjects in any order.