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Roast 18 – Guatemala Acatenango (Caturra, Washed) – Personal Roast (For a Friend)
Roaster: Gene Café CBR-301Coffee: Guatemala Acatenango, CaturraProcess: WashedBatch size: 250.1 gEnd weight: 209.9 gWeight loss: 16.1%Set temperature: 250 °CRoast date: 2026-02-10 Intent Personal roast for sharing.Executed…
Sample Roast 1 — Costa Rica, Geisha (fermented & washed)
Gene Café CBR-301 | Sample roast (≈50 g) Why this roast exists This roast wasn’t about flavour discovery or proving whether Geisha is “worth it”. It…
Roast 8 – Brazil Topazio, Natural | Upper-bound reference
Coffee: Brazil Topazio, naturalRoaster: Gene Café CBR-301Batch: 250 gSet temperature: 250 °C In: 250 g → Out: 205.4 g (17.8% WL)Total time: 13:23 Why this roast…
Roast 17 — Ethiopia Guji Karume (Natural) | Roast Record
Ethiopia Guji Karume — Natural Date: 8th Feb 2026Roaster: Gene Café CBR-301Batch: 250 gSet temperature: 250 °CIn / Out: 250 g → 214.8 gWeight loss: 14.1%Total…
Roast 16 — Guatemala Acatenango, Caturra (washed) | Personal roast
Roaster: Gene Café CBR-301Batch size: 250 gSet temperature: 250 °COut: 209.7 gWeight loss: 16.1%Total time: ~13:10Cooling initiated: ~80 s after rolling first crack Why this roast…
Green Coffees Used
Green Coffees Used This page records the green coffees used throughout Coffee | One Roast at a Time. It is not a buying guide or a…
Roast 15 — Honduras Catuai, Natural
Development contrast Context Roast 15 was planned as a controlled development contrast against Roast 14.The intent was not exploration or optimisation, but to extend development slightly…
Quick Start
Quick Start isn’t about doing less. It’s about deciding when “good enough” really is good enough. A Good-Enough Roast for Clean Naturals (Gene Café CBR-301) This…
The Gene Café CBR-301 — What Has Stopped Changing
The Gene Café CBR-301 — What Has Stopped Changing This page records what has remained consistent across repeated roasts on a single Gene Café CBR-301 setup.…
Roast 14 — Honduras Catuai Natural
Gene Café CBR-301 | Active Exhaust Date: 2026-02-??Batch: 250 gOut: 217 gWeight loss: 13.2%Set temp: 250 °CPreheat: NoneEnd time: ~12:4xCoffee: Honduras, Chinacla (La Paz) — Finca…
Roast 7 — Finished, shared, and nothing wasted
Date: 2026-01-24 Context Roast 7 was a 300 g batch roasted on the Gene Café CBR-301, and it has now been fully consumed. This roast was…
Roast 13 – Ethiopia Guji Karume (Natural)
Roast 13 — Ethiopia Guji Karume (Natural) Date: 2026-02-01 Context This roast was recorded in real time and narrated as it happened, not as an instructional…
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First crack · Cold and warm starts · Water · Coffee pricing · All articles
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