Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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wedge shaped

A bound book that is thicker at the spine than at the fore edge. The condition is caused by excessive, uncompensated sewing swell, compensation guards that are too thick for the inserted material, excessive guarding of damaged folds, or by guards made of paper that is too thick. Such a condition may at times also be the reverse. where the fore edge is thicker than the spine, because of swelling of the paper, or an improperly folded map, etc. In the latter case, the fore edge swells but the spine, being fixed in position, does not. (236 , 256 )

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