smoke proof

See also: smokeproof

English

Pronunciation
  • Rhymes: -uːf

Noun

smoke proof (plural smoke proofs)

  1. (typography, now chiefly historical) A temporary print made from a thin coating of carbon deposited on the punch surface by a candle flame, used in evaluating the progress of the design of the punch.
    • 2009, James Mosley, edited by Michael F Suarez and Michael L Turner, The Cambridge History of the Book in Britain, vol. V, Cambridge, published 2014, page 171:
      Progress was observed from time to time by holding the end of the punch in the sooty flame of a candle or lamp and by pressing it on slightly damp paper to make a smoke proof.
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