Glossary

Effective area

The total area of the porous medium exposed to flow in a filter element.

Efficiency

The ability, expressed as a percentage, of a filter to remove a specified artificial contaminant at a given contaminant concentration under specified test conditions.

Endotoxin

A toxin produced by bacteria. The toxin is present in the environment only after the death of the bacteria.

Endotoxine

A toxin produced by bacteria. The toxin is present in the environment only after the death of the bacteria.

Exposing

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.

Exposure time

Time, the stencil is exposed to UV emission.

Extractables

Substances that can be leached from a filter during the filtration process or under other specified conditions.