Meaning of smoke proof | Babel Free
Definitions
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.
Examples
“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.”
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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