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
Polymer capacitor aluminum oxide and tantalum pentoxide have little impact on the specific capacity due to different safety margins in oxide layers. Polymer Ta-e-caps use an oxide layer thickness that corresponds to approximately four times the rated voltage, while the polymer Al-e-caps have about twice the rated voltage. Cylindrical polymer aluminum capacitors based on the technique of wound aluminum electrolytic capacitors with liquid electrolytes. They are available only with aluminum as anode material. They are intended for larger capacitance values compared to rectangular polymer capacitors. Due to their design, they may vary in height on a given surface mounting area so that