Chapter 5 Recap
This can make drip coffee more difficult to hit the precise extraction yield target.
Drip coffee is usually much more transparent than immersion brews because of the sedimentary filter bed.
Coffee bed depth is an important variable to monitor and as a rule, the deeper the bed, the coarser you will need to grind.
The liquid retained in the coffee grinds has traditionally been considered so dilute, we can round it down to zero.
Capillary Action: the ability of a liquid to flow in narrow spaces against the force of gravity.
Darcy’s Law: an equation developed by Henry Darcy which describes the flow of water through a porous medium. It suggests there is an inverse relationship between the thickness of a bed and the flow rate of the liquid.