Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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1. Paper pulp or fibers which adhere to the wet or dry sections of the papermaking machine. See also: PICKING . 2. A particle of hardened ink, dirt, or paper, or a piece of composition roller, embedded in the hollow of printing type, filling up its face and causing a dark spot to appear on the printed sheet. 3. A small particle of metal on an electrotype or stereotype plate, caused by a slight defect in the mold, and resulting in a spot or blot on the printed sheet. 4. A white spot on the printed surface of a sheet, and caused by ink adhering to the form and pulling a particle from the surface of the paper. 5. The condition in an adhesive which causes it to transfer unevenly from an adhesive applicator due to high surface tack.

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