Unusual types of gramophone records vinyl colors became too high, but the different colored labels were continued, at least for popular music (black) and classical (red, as in "Red Seal"). In October 1945, RCA Victor put on the market its first "non-breakable" phonograph records. Made of a ruby-red, translucent vinyl resin plastic, they cost twice as much ($2 per disc) as the 12-inch Victor Red Seal. In the 1960s, a distinction was made in label colors of promotional copies of 45 RPM records as well, with pop music being issued on yellow labels and country on light green. In the 1970s, such gimmicks started to
Unusual types of gramophone records 10 cm or 2.75 and 4 inches) make them unplayable on turntables with automatic return tonearms. In the Soviet Union in the 1930s and 1960s, bootleg copies of banned Western music were individually recorded onto used medical x-ray film and sold on the black market. These were called "ribs" or 'Roentgenizdat'. The first discs by Berliner Gramophone were black, and that has been the standard color for gramophone records in times subsequent. As early as 1899, the Vitaphone Talking Machine Co. made records that were brownish-red in color. The American Record Company produced records made of blue shellac for their