The Chemex 10 Cup is the largest member of the classic Chemex line, holding close to 1.5 L of brewed coffee and designed around the kind of morning where five or six people are already at the table. At this capacity the carafe becomes a genuine entertaining tool: one brew is a pot, and the hourglass silhouette earns its keep at the centre of the table.
Brewing ten cups is where Chemex technique really gets tested. The bed is deep enough that even, agitation-free pours become critical to prevent channelling, and the drawdown — often 6 to 8 minutes — gives the grind plenty of time to over-extract if it is set too fine. A sensible starting point is 80 g of coffee to 1200 g of water (1:15), a grind two notches coarser than your 6 Cup recipe, water at 95–96 °C, and a bloom of 45 to 60 seconds to let the extra CO₂ escape.
Use a gooseneck kettle with a wide reservoir, or plan to refill halfway through. The reward for the extra care is a Chemex cup that somehow keeps its delicate clarity at volume — a genuinely difficult thing to pull off with any other brewer at this size.