zig-zag endpaper
A type of ENDPAPER
devised by either Douglas Cockerell or T. J.
Cobden-Sanderson toward the end of the 19th
century. The zig-zag endpaper is designed to
eliminate drag on the fly leaves and text block,
some thing usually accomplished by sewing the
endpaper below the gusset so that it can expand
with the movement of the board as the book is
opened. Unfortunately, sewing the endpaper at only
one point is structurally unsound, as it leaves
the fly leaves, as well as the leather joint (if
used), secured only by tipping. If the endpaper is
sewn through both the fly leaves and the made
endpaper, which is the usual practice, the
advantage of flexibility is negated and drag
results, which the endpaper was intended to
eliminate. Also called "v" endpaper, "w" endpaper.
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