smoke proof
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See also: smokeproof
English[edit]
Pronunciation[edit]
- Rhymes: -uːf
Noun[edit]
smoke proof (plural smoke proofs)
- (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.