Vellum (from the Old French Vélin, for "calfskin")'s mammal skin prepared for writing or printing on, to produce single pages, scrolls, codices or books. It's generally smooth and durable, although there're great variations depending on preparation, the quality of the skin and the type of animal used. The manufacture involves the cleaning, bleaching, stretching on a frame, and scraping with a hemispherical knife of the skin. To create tension, scraping's alternated by wetting and drying. A… (More on Vellum)