POURS

4

Intern's First Crush

Designed for: wine · rum

THE COFFEE INTERN · Yunnan, Pu'er Lancang

First brew estimate — rate it to improve

Anaerobic Natural · Light

Pour Sequence · 4 Pours

Extraction Strategy

Fermentation character control

Anaerobic fermentation produces complex winey compounds that over-extract faster than standard beans. Every parameter is constrained — RPM ceiling enforced, agitation controlled, temperature conservative — to manage fermentation character without losing it.

Bean Character

Dense bean — elevated growing altitude

High cell-wall resistance limits water penetration — grind -4 from roast baseline. Bloom and temperature offset upward to compensate. Reduces uneven saturation risk across the bed.

Engine Calibration

Fermentation control

Dense high-altitude beans

Direct extraction

Active agitation

Grind · 68

Coarse grind — fast flow, controlled extraction

Looks like raw cane sugar crystals or cracked pepper. Derived from Stage 1 range 66–72. anaerobic natural offset: +8 (coarser), density -4. Limits over-extraction of process compounds. History pattern: -1. Minor — does not override bean constraints.

Bloom · 50s

Standard bloom — moderate CO₂ degassing

47s base — derived from bean density and process. Roast date adjustment: extended 3s for elevated CO₂. Insufficient bloom causes channelling across all subsequent pours.

Temp · 91→86°C

Descending curve — 5°C drop across pours

Starts at 91°C — upper bound of Stage 1 range. Descends 2°C per pour as solubles concentration drops. anaerobic natural ceiling: 91°C. Hard constraint — range clipped at upper bound.

Pour Structure · 4 Pours

Four-pour structure — balanced precision

Light roast targets F1 range 4–5. Bean density (dense) favours more pours. anaerobic natural process: constrains range to 3–4 pours.

Learning · From Your History

Calibrated from your brewing history

Grind shifted finer by 1. Pattern was weak but consistent across recent brews. Minor adjustment applied. Effect is limited and does not override bean constraints.