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
Gramophone Company mechanical patents that he owned, which patents were valuable in the agreement with Columbia. Thus, Victor and Columbia began making flat records in the U.S., with UK Gramophone and others continuing to do so outside the U.S. This left Edison the only major player in the making of cylinders; Columbia still made a limited number for a few years. Emile Berliner went out of the business. All he had left were the masters of his earlier records. These he took to Canada and reformed his Berliner label in Montreal, where he used the "His Master's Voice" trademark. Edison would soon