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
Leibniz Institute for Polymer Research Leibniz Institute for Polymer Research The Leibniz Institute for Polymer Research in Dresden () – in short IPF Dresden – is a non-university research institute and a member of the Gottfried Wilhelm Leibniz Scientific Community. The IPF is carrying out fundamental as well as application-oriented research in all areas of polymer science and investigates polymer materials with new or improved characteristics. In the material development, emphasis is given to nanotechnological aspects as well as to biosystem interfaces. The IPF’s research program is jointly set up and implemented by scientists of the different IPF institutes. It comprises the following four research