abstract background bookbinding calf calf-leather calfskin color colour cream crease creased creases durable fine-grain flexible hide juvenile-cattle-skin leather skin soft suede-like supple surface surfaces tanned tanning texture textures valuable veau-velours folds colored coloured decorative feel finish gray grey tactile touch upholstery attached cloth discoloration faded fading light-blue ribbed ribbon stitches stitching V