How to Roast Colombia ASOSPAC COL03: NCT Filter B Recipe
Dialing in Colombia ASOSPAC COL03 — 12 logged home roasts with real metrics
Colombia · Tolima · Washed · 1550-2,030 MASL · Excelso EP · John Burton
Aroma of chocolate, molasses and spices. Flavours of dark chocolate, cranberry and raw sugar with a long caramelized almond aftertaste. Medium-high crisp acidity and medium coating body. Score: 83.75+
“nice and different. i've got a chocolaty note but also some fruit.”
Winning batch R-092 · 2026-07-09
Cup quality across 12 attempts
Each point is a roast scored from tasting notes (1 = miss, 5 = dialed in). The series stops at the teal halo — once dialed in, later repeats aren’t scored the same way.
Where the good cups live
Roast level vs batch size. Color = profile family; larger dots = better cups. Notice how quality clusters once batch size moves to 100–120g.
Roast mechanics that stuck
DTR, roast loss, and rate-of-rise across attempts with klog data. Each series is scaled on its own axis so shapes are comparable.
What the data taught us
- 1Early Raost runs at high DTR tasted dark/roasty with no fruit — wrong family for a bright Colombian goal.
- 29minFilter around level 1.7–1.8 / ~110–120g first unlocked clear fruit (R-034).
- 3Latest sweet spot: NCT Filter B at 2.4 / 100g — chocolate plus fruit; a tick lighter (2.2) is the current fine-tune.
- 4Washed F-Series still sometimes brought green notes even when fruit showed — NCT B was cleaner for this lot.
Want to log a journey like this?
Track profiles, klog metrics, and tasting notes until the cup clicks.