When hot water contacts coffee grounds, extraction happens in two distinct phases:
At the heart of the science is the extraction process. Extraction is not instantaneous; it occurs in two distinct phases. the physics of filter coffee pdf full
The remaining soluble compounds are trapped inside the porous matrix of the coffee bean. Water must penetrate the pores, dissolve the solids, and transport them out into the main body of liquid. Fick’s First Law of Diffusion When hot water contacts coffee grounds, extraction happens