inside rolling block
A block of wood the thickness of a book so that
its opened cover will lie perfectly flat on its
top. It has a concave edge into which the rounded
spine of the book fits, thus providing support for
the entire cover up to the joint. It is used when
finishing the inside of the cover, and tooling the
turn-ins. Several sizes of block are required for
books of different thicknesses. (115 )
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