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A thick cover paper made by hand in a single sheet from pulp with very long fibres, and heavily sized with gelatine. It was often formed on sheets of textile that leave a clear impression of the woven textile on one or both surfaces. Case covers made from cartonnage were used in Italy from at least the 1480s through to the mid-nineteenth century. Sheets of cartonnage were also laminated with paste to create thicker and stiffer boards for books.

Additional reference: 
Entry for 'cartonnage', p. 589 (modified)

Pickwoad, Onward and Downward... (1994)

Nicholas Pickwoad (1994), “Onward and Downward: How Binders Coped with the Printing Press before 1800”, in A Millennium of the Book: Production, Design and Illustration in Manuscript and Print 900-1900, edited by Michael Harris and Robin Myers, Publishing Pathways 8, Winchester, St. Paul’s Bibliographies, pp. 61–106.

Additional reference: 
p. 88
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