Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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Originally, a judgement of the amount of light reflected to the eye from the surface of a material, regardless of hue or color saturation. Brightness is now measured by optical comparators. Many factors affect the brightness of a material such as paper, including the degree of bleaching of the pulp, as well as the addition of chemicals. Chemically treated high-grade text and book papers have a brightness in the range of about 96 (on a scale of 100), coated papers range from about 70 to 85, while mechanical wood machine-coated papers are in the range of about 60 to 75. Newsprint is generally below 60. (17 , 72 )

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