alpha paper

English

Noun

alpha paper (uncountable)

  1. (UK, dated, photography) A sensitized photographic paper that is coated with gelatin containing silver bromide and chloride, and is used for obtaining positives by artificial light.
    • 1939, Herald, volume 5:
      The sheets of alpha paper which have been grained are first dipped in soft acetate remaining there for three minutes. They are dried in an oven and made ready for impregnation with hard acetate.
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