Antihalation
the process of treating a film base with a light-absorbing substance to prevent refraction of light from the rear of the film.
resistant to .
noun
(photog)
a process by which light, p-ssing through the emulsion on a film or plate, is not reflected back into it but is absorbed by a layer of dye or pigment, usually on the back of the film, thus preventing halation
(as modifier): antihalation backing
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