continuous guard
A type of guard to which the folios of blankbooks
are frequently sewn, the purpose being to allow
the book to lie very flat when open. The folds of
the guard, which are about 1/2 inch deep, are
double the number of the folios of the book.
Unlike the CONCERTINA
GUARD , the folios (sections) do not fit into
the folds of the guard, but rest against the edges
of the folds of the guard, with the results that
the opposite edges of the guard become the spine
of the book, much in the manner of the REVERSED V-GUARD .
The continuous guard is usually made of linen.
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