Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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fly embossing press

An early version of the BLOCKING PRESS , which was capable of exerting the enormous pressure required to block covers with engraved plates often of the same size as the cover, even quartos and folios. This type of press was probably introduced sometime in the late 1820s by JOSEPH THOUVENIN and was used extensively until the later part of the 19th century. The description "fly" may stem from the instantaneous release of pressure (the platen "flying" up). (203 , 236 )

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