Goldbeater's skin

Goldbeater's skin—the outer membrane of a calf's intestine—is a parchment traditionally used in the process of making gold leaf by beating, reducing gold into mere 1 μm-thick leaves. Up to 120 sheets of gold laminated with goldbeater's skin can be beaten at the same time, since the skin is thin, elastic and does not tear under heavy goldbeating.

Goldbeater's skin

Goldbeater's skin—the outer membrane of a calf's intestine—is a parchment traditionally used in the process of making gold leaf by beating, reducing gold into mere 1 μm-thick leaves. Up to 120 sheets of gold laminated with goldbeater's skin can be beaten at the same time, since the skin is thin, elastic and does not tear under heavy goldbeating.