1. n. []
The volume of mud filtrate measured after 30 minutes in API static filtration tests. The volume and cake thickness are the two data points in the test.
See: dynamic filtration, filtercake, filter medium, filter-cake thickness, fluid-loss control, fluid-loss-control material, high-pressure, high-temperature filtration test, low-pressure, low-temperature filtration test, relative filtrate volume, spurt loss, static filtration
