Proof (printing)

Definition and stakes

Benjamin Drew,  Pens and Types

“ Nearly all manuscript copy is indebted to the compositor and proof-reader for the proper punctuation; and many errors in spelling, made by men who probably know better, but write hastily, are silently corrected in the printing-office. Contradictions, errors of fact, anachronisms, imperfect sentences, solecisms, barbarisms, are modestly pointed out to the author by the proof-reader’s “quære,” or by a carefully worded suggestion; and, most usually, the proof is returned without comment,—and none is needed,—corrected according to the proof-reader’s intimations. ”
Source: Gutenberg

Theodore Low DeVinne and Charles Shattuck Hill,  The New International Encyclopædia…

“ Proofs are taken from the type in galley and in page form, which are read for errors, so that corrections may be made before the type is sent to press. At least two proofs of the type—a galley proof and a page proof—are always taken and read for errors, and very often in careful work several proofs of each kind are ‘pulled’ and read by different persons. See Proof-Reading.
The printer's form may consist of any number of pages from 2 to 128. ‘Imposition’ is a method of arranging pages so that they will follow one another upon the printed paper in the proper consecutive order.
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Source: Wikisource

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