Processing · modern
Extended fermentation runs coffee fermentation from 48 hours to a week or more, monitored by temperature and pH. Intense fruit at best, sour and boozy at worst.
Traditional washed processing ferments for 12 to 72 hours. Extended fermentation runs far longer — 48 hours to a week or more — usually with temperature and pH monitored throughout.
Longer fermentation produces more of the compounds microbes create, and shifts the profile towards intense fruit, wine and sometimes spirit-like notes.
At its best it produces genuinely remarkable and distinctive cups.
The line between intense and spoiled is narrow. Over-fermented coffee tastes sour, boozy and vinegary — not complex, just wrong.
Because the process is long, an error compounds. A tank that runs a few degrees warm for a day produces a different coffee from the one intended, and there is no way back.
Measurement. Producers running extended fermentation successfully monitor temperature, pH and sometimes Brix continuously, and stop on data rather than on a schedule.
That equipment and expertise is why these lots cost what they do.
The same one as anaerobic and co-fermentation: does the process reveal the coffee or replace it? Extended fermentation sits in the middle — it uses only what is on the fruit, and it can dominate the origin completely.
Filter, very light roast, clean brewer.
The equipment this actually requires — not a shopping list, the shortest route to doing it properly.
60° cone · spiral ribs · 1–4 cups
The most transparent cup you can brew for twenty dollars, and the least forgiving. Ceramic holds heat where plastic does not — and the open bottom means your pour, not the dripper, decides the coffee.
Best for: Someone who wants to taste what a single-origin coffee is actually doing.
64 mm (2.52 in) flat burr · filter only · single dose
64 mm (2.52 in) flat burrs, near-zero retention and a footprint the size of a mug, built for filter and honest about not doing espresso. For pour-over it is the clearest grind you can buy at this price.
Best for: V60, Chemex, AeroPress and batch brewing, where clarity is the whole point.
0.9 L · ±1 °C (±1.8 °F) hold · counterbalanced gooseneck
The best-pouring kettle sold, and the hold function matters more than the thermometer. Expensive for boiling water — but if you brew pour-over daily, it is the accessory that most improves the cup.
Best for: Daily pour-over, where flow rate is the variable you are trying to control.
