Coffee Gear & Calibration

Grinder — 1Zpresso K-Ultra

Important: 20μm is burr gap movement, not particle size change. Don’t multiply clicks × 20μm to estimate particle size — use the official brew range instead.

Official 1Zpresso brew ranges (K-Ultra)

My dial-in starting points

• Aeropress, washed light roast: 60 clicks (6.0) — mid-range
• Aeropress, natural / fermented: TBD — likely a bit coarser to keep clarity
• V60, washed light roast: 85 clicks (8.5) — mid of V60 range

Adjustment increments: ±5 clicks = meaningful step, ±2 clicks = fine-tune.

Brewers

Aeropress

Standard orientation, paper filter, rinsed.

Standard recipe (washed light roast)

• 14g coffee / 230g water / 1:16.4
• 96°C, K-Ultra at 60 clicks
• Bloom 50g / 30s, pour to 230g, stir 3x, steep to 1:30, press ~30s
• Total ~2:00

Hario V60 02 (plastic)

Plastic body — no heat loss, light, cheap. Tabbed white Hario filters (200ct).

Server: brew into the Chemex carafe. Wide mouth holds the V60 perfectly, no extra purchase needed.

Standard recipe (washed light roast)

• 15g coffee / 250g water / 1:16.7
• 96°C, K-Ultra at 85 clicks
• Filter rinsed thoroughly first
• Pours: 45g bloom (swirl, wait to 0:45) → pour to 150g by 1:15 → pour to 250g by 1:45 → drawdown to ~3:00
• Acceptable drawdown window: 2:45–3:30

Chemex

Doubles as V60 server. Standalone use TBD — heavy bonded paper makes a clean cup but mutes some bean character vs V60.

Water — city tap → Brita Elite

Moderately soft to start, Brita pulls hardness down further. Probably ~50–80 ppm TDS — slightly under SCA’s 75–150 ideal but acceptable. Not the bottleneck for taste differences. If body ever feels thin, third-wave water packets (Lotus, Aquacode) would help.

Scale & Kettle

• Kettle: gooseneck (model TBD)
• Scale: TBD