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A reference to paper that has been coated with various materials to make the surface of the paper more receptive for the reproduction of text and images. Coated paper often improves detail and color density on printed documents. A coated clay pigment, for example, improves the smoothness of the paper and reduces the absorbency. Coatings added to groundwood papers provide them with a greater degree of permanency. The natural tendency of groundwood papers to yellow is also reduced. Coated paper finishes can be categorized as matte, dull, cast, gloss, and high gloss. The coating can be on both sides of the stock (coated two sides, "C2S") or on one side only (coated one side, "C1S"). Coatings can be applied online during the paper manufacturing process or afterward by an offline coater.
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