The layer of solids that is retained on the surface of a filter.

drilling term – the wall cake that forms from the platelets in bentonite-based drilling mud. Filter cake is the barrier between the borehole and the formation, limiting the amount of drilling mud needed to complete the borehole.

Build up of mud solids on the wall of a well, or the build up of polymer on a fracture face.

The accumulation of dust on a bag. Often assists in the filtration process. Also see Cake.

The accumulated particles that have collected on a filter surface and then act as a filter medium themselves to enhance the filtering characteristics of the original filter medium.

the buildup of particles on the surface of filter medium. Filter cake can improve the removal performance of a filter, but it also leads to increased pressure drop and reduced fluid flow.

The combined layers of solids, precoat, and debris removed in the filtration process and accumulated on the surface of the filter medium.

The accumulation of dust on a bag before cleaning. This cake assists in the filtering of dust.

A filter cake is formed by the substances that are retained in or on a filter (depending on whether a depth or a surface filter is used). The filter cake grows in the course of filtration, becomes "thicker" as particulate matter is being retained. With increasing layer thickness the flow resistance of the filter cake increases.