Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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loading

1. The operation of incorporating finely divided, relatively insoluble, white powders into a papermaking stock, either directly or by chemical processes, so as to improve the printing surface and ink absorption, to give a higher finish and greater opacity, to improve formation and flatness, and to improve dimensional stability. Loading is usually done prior to sheet formation. Loading was first used in the 19th century, apparently surreptitiously, to save pulp and reduce the cost to the papermaker; however, it was then discovered that restricted quantities of loading improved the paper. 2. Mineral matter, such as clay, barium sulfate, calcium carbonate, china clay, calcium sulfite, magnesium silicate, titanium oxide, etc., used as filler materials in paper. (17 , 58 , 143 , 365 )




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