A term used to describe a variety of processes or procedures, professional and amateur, under which an issue is pressed to eliminate wrinkles, bends, dimples and/or other perceived defects and thus improve its appearance. Some types of pressing involve disassembling the book and performing other work on it prior to its pressing and reassembly. Some methods are generally easily discerned by professionals and amateurs. Other types of pressing, however, can pose difficulty for even experienced professionals to detect. In all cases, readers are cautioned that unintended damage can occur in some instances. Related defects will diminish an issue’s grade correspondingly rather than improve it.

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