The color blue does absorb heat. In general, the more light an object absorbs, the more heat absorbed since light is energy. Black absorbs the most heat. A black object absorbs all wavelengths of light and reflects none.
Parchment is a writing material made from specially prepared untanned skins of animalsâprimarily sheep, calves, and goats. It has been used as a writing medium for over two millennia. Vellum is a finer quality parchment made from the skins of kids, lambs, and young calves. It may be called animal membrane by libraries and museums that wish to avoid distinguishing between parchment and the more restricted term vellum (see below).
In Germany, France, and the Netherlands there also developed thriving paper-making concerns by 1400. Concurrent with the rise of printing in the last half of the 15th century was the supplanting of vellum by paper in the making of books, with the former all but abandoned within a century.