Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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photocopying paper

A base paper of superior quality that is coated with a fast light-sensitive emulsion for use in photocopying machines, and also for designs and layouts. The paper is produced from pulps ranging from 100% cotton fiber to 100% chemical wood pulps, the latter being generally of papermaking alpha grade. The pulp must be highly purified as all metallic residues must be removed. The paper is also given wet strength treatment to enable it to withstand the acids and alkalis and other photographic solutions used in photographic processes. Inertness to photographic sensitizing solutions is important, as are uniformity of color and surface. The base paper is finished with gelatin sizing so as to prevent the photographic emulsion coating from penetrating too deeply into the sheets. (17 )




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