Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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neutral sulfite process

A paper pulping process that dates back to at least 1880, when a method was developed for using an alkaline solution of sulfite in iron digesters. The process employs sodium sulfite with sufficient alkali added, to neutralize the acids developed during the cooking process. The alkali may be caustic soda, soda ash, or sodium bicarbonate. (17 , 324 )

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