The total area of the porous medium exposed to flow in a filter element.
The ability, expressed as a percentage, of a filter to remove a specified artificial contaminant at a given contaminant concentration under specified test conditions.
Exposing the photosensitive layer (emulsion) to UV light. The uncovered areas will harden and become water insoluble. The unexposed areas remain water soluble and can be washed out with water.
Time, the stencil is exposed to UV emission.
Substances that can be leached from a filter during the filtration process or under other specified conditions.