Silver screen
The New York Times reported on the "First National Motion Picture Exposition" which took place in 1916 and started with "a parade of the stars of the silver screen".[6] The Williams Perlite was marketed as an all-purpose, tear-resistant screen that was installed in many major movie houses of the day, including the rapidly expanding theaters built by Warner Bros of nearby Youngstown, Ohio.They were advertised as providing "a brighter picture at all angles" with "top reflectivity at direct viewing" and "extra diffusion for side seats and balcony.True silver screens, however, provide narrower horizontal/vertical viewing angles compared to their more modern counterparts because of their inability to completely disperse light.In addition, a single projection source tends to over-saturate the center of the screen and leave the peripheries darker, depending on the position of the viewer and how well adjusted the lamp head is, a phenomenon known as hot-spotting.