Filter

Description

A material used to separate components based on their physical properties, such as size or wavelength. Particle beds (sand, earth diatomaceous earth, charcoal) or membranes (cheesecloth, paper, fiber nylon) are used to remove large particles or impurities from solutions. filter Light or filter color filters are used to absorb, minimize, or block specific wavelengths. See records for: filter barrier filter, cloth filter cloth, paper filter paper, filter membrane filter, density filter neutral density filter, and glass filter dichroic glass filter.