Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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acid-free leather

Ostensibly, leather manufactured without the use of acids, but interpreted by most producers to mean leather from which as much acid as possible has been removed. The removal of acid used in producing leather is a costly and time-consuming process, and calls for repeated washing of the stock. Tanning agents which contain a relatively high amount of salts of weak acids, of which MYRABOLANS is one, are said to protect leather against acids used in manufacture or those absorbed from the atmosphere. (175 , 306 )

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