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Vellum is a writing material made from the processed skins of animals, typically calf, lamb, or kid. It is a fine-grained, unsplit skin, prepared to be written on or used for binding books. Historically, vellum is considered a higher quality of parchment, though the terms have often been used interchangeably.1234

The production of parchment, and subsequently vellum, was a significant development that facilitated the success of the codex, an early form of the book. This allowed for writing on both sides of a leaf and the creation of bound books, which eventually replaced papyrus rolls. In modern times, the terms "vellum" and "parchment" are also sometimes used to describe a high-quality, cream-colored paper.3241

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