Vellum
see also: Etymology of Vellum
Calfskin still-born child, sought by the calligraphers, the miniaturists and the bookbinders for his whiteness, his softness and its smoothness The vellum is also a fine skin used for the Reliure.
Paper mill
The Vellum paper is a thin Papier, pure wire (Chiffon, Alfa, Coton, etc) often very white.It is from the paper machine with extremely fine mesh wires invented in 1750 by English John Baskerville.
Contrary to paper known as “Vergé” vellum does not comprise any “phantom image”.