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Chemex grind size

Chemex grind size on a Eureka Mignon Specialita

For Chemex on a Eureka Mignon Specialita, start at 1+4. That is about 700 µm, a medium grind.

Eureka Mignon Specialita setting for Chemex1+4Medium grind, ~700 µm
Finer 1+3.5Coarser 1+4.5Step size 25.1 µm

Adjusting from 1+4

WhenSettingParticle size
Finer: sour or thin cups1+3.5~667 µm
Start here1+4~700 µm
Coarser: bitter or dry cups1+4.5~727 µm

Lower numbers are finer. To grind finer, turn the setting down. Change one step at a time, and brew again before changing anything else.

Starting recipe for Chemex

Steps

  1. Rinse the thick filter well and dump the water.
  2. Add 30 g of medium-coarse coffee.
  3. Pour 60 g, wait 45 seconds, then pour slowly to 480 g by about 2:30.
  4. Let it drain. Total time is around 4:00 to 4:30.
  5. Taste. Sour: grind a little finer. Bitter or muddy: grind coarser.

Other brew methods on a Eureka Mignon Specialita

Chemex on other grinders

Questions

What grind setting is best for Chemex on a Eureka Mignon Specialita?

Start at 1+4 and adjust by taste. Lower numbers are finer. To grind finer, turn the setting down.

How do I know if I should grind finer or coarser?

Fast and sour: grind finer by a step or two. Slow and bitter: grind coarser.

Where does this setting come from?

The Eureka Mignon Specialita is mapped to particle size in microns, fitted from the Honest Coffee Guide's settings for this grinder. It is a starting point, not a guarantee.