Book binding covers are used to protect documents like a thesis or books, etc. by placing a cover on the front and backside. This can be done with a strong cardboard, or a PVC-sheet or a PP sheet. These sheets can be transparent, semi-transparent (translucent) or opaque.
Binding covers can be used with a large variety of binding materials, like plastic binding rings, metallic double loop wires, spirals, etc. Below you can find a number of the most common binding covers.