Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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calcium hypochlorite

Any hypochlorite of calcium, e.g., the normal anhydrous salt (Ca(ClO)2), that is generally found in commercial products containing 70 to 75% available chlorine. Calcium hypochlorite is used by many paper conservationists to bleach archival papers, and it is also used as an oxidizing agent to reduce the effects of FOXING . Its use is potentially harmful, as the chlorine is difficult to remove. Also known as "bleaching powder."




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