antihalation

American  

[an-tee-hey-ley-shuhn, -ha-, an-tahy-] / ˌæn ti heɪˈleɪ ʃən, -hæ-, ˌæn taɪ- /

noun

1. the process of treating a film base with a light-absorbing substance to prevent refraction of light from the rear of the film.

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adjective

1. resistant to halation.

antihalation British  

/ ˌæntɪhəˈleɪʃən /

noun

1. photog

   1. a process by which light, passing 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

   2. ( as modifier )

      antihalation backing

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Etymology

Origin of antihalation

First recorded in 1900–05; anti- + halation