Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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unbleached sulfate pulp

A paper pulp produced mainly from softwood trees containing a relatively high proportion of resin, e.g., the pines, which are cooked for relatively short cycles. The pulp has a very low color, is relatively shivey, and is unsuitable for bleaching because of its high chlorine requirement. It is characterized by exceptional strength. (17 , 98 )

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