Even a good burr grinder can sometimes leave small particles of coffee that slip through the screen of my French press, giving the coffee a bit of a grainy texture or an over-brewed flavor. Proposed is a coffee maker that uses diatomaceous earth to filter out the ground coffee, just as a pool filter does. This would produce extremely clear coffee with no paper taste, and the filter would be back-flushable.
-- kevinthenerd, May 24 2017

I wonder which components of the coffee would make it through a carbon filter? You could simply use an absolute aperture filter like those used for filtering drinking water - they come in different sizes and you could play around until you found the right size.
-- Custardguts, May 24 2017


Ah yes, the old No.4 Coffee Machine. Gotta backflush every 3k gallons or so, of course.
-- FlyingToaster, May 24 2017


Instant granules are pretty grit-free
-- pocmloc, May 25 2017


Better than a DG coffee filter.

Decomposed Granite
-- popbottle, May 25 2017


Depleted uranium. I like mine with a bit of zing.
-- RayfordSteele, May 25 2017



random, halfbakery