silver sheet

noun3

1. •
   A thin sheet of silver, e.g. used in metalworking or jewellery.
2. •
   (informal, old-fashioned) A cinema screen onto which movies are projected.

   • Famous Players-Lasky Corporation, producers of Paramount Pictures today, has its product displayed upon the silver sheet in every country where there is a projection machine. — 1920
3. •
   (old-fashioned) By extension, movies, the film industry, or that which is related to movies or cinema (often preceded with "the")

   • After years in local theatre productions, he made his debut on the silver sheet and became known around the world.