proof
1. A leaf or leaves of a book purposely left
untrimmed by the binder as evidence that the book
has not been unduly trimmed. Proof assumes that at
least one of the sections of the book is shorter
than the others. The practice, which is now
virtually obsolete, stems from the time when
binders, and even very fine binders, had the
reputation of cutting down the leaves of a book as
much as possible. 2. An impression made from type
before the printing run is begun. The first proof
is corrected by the printer's reader or corrector
and returned to the compositor. After the printer
is satisfied with the type as set, a proof is sent
to the author for correction. This proof is
usually on a long sheet of normal width, called a
galley proof. After the author has made his
corrections the type is made up into pages, page
numbers and running heads are added, and a final
page proof is sent to the author. In modern
practice the author often sees only the galleys.
3. A preliminary impression taken from an engraved
plate or block, or a lithographic stone. Usually
called a "trial proof." 4. An impression taken
from a finished plate or block before the regular
impression is published and usually before the
title or other inscription is added. Also called
"proof print" or"proof impression." (12 , 156 , 241 )
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