Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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calcium bicarbonate

A salt obtained by replacing only one of the two hydrogen atoms in carbonic acid (H 2 CO 3 ) by the metallic atom calcium, giving (Ca(HCO 3 )2). It is employed in a 0.2% solution to carbonate excess calcium hydroxide used in deacidifying paper, and also to precipitate calcium carbonate into the fibers of the paper being treated. The precipitated calcium carbonate acts as a buffer to neutralize any acid that forms in the paper subsequent to treatment. (31 )

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