when did the record industry begin using polyvinyl plastic to manufacture records
Phonograph record In 1931, RCA Victor introduced vinyl plastic-based Victrolac as a material for unusual-format and special-purpose records. One was a 16-inch, ​33 1⁄3 rpm record used by the Vitaphone sound-on-disc movie system. In 1932, RCA began using Victrolac in a home recording system. By the end of the 1930s vinyl's light weight, strength, and low surface noise had made it the preferred material for prerecorded radio programming and other critical applications. For ordinary 78 rpm records, however, the much higher cost of the synthetic plastic, as well as its vulnerability to the heavy pickups and mass-produced steel needles used in home record players, made its general substitution for shellac impractical at that time. During the Second World War, the United States Armed Forces produced thousands of 12-inch vinyl 78 rpm V-Discs for use by the troops overseas.[20] After the war, the use of vinyl became more practical as new record players with lightweight crystal pickups and precision-ground styli made of sapphire or an exotic osmium alloy proliferated. In late 1945, RCA Victor began offering "De Luxe" transparent red vinyl pressings of some Red Seal classical 78s, at a De luxe price. Later, Decca Records introduced vinyl Deccalite 78s, while other record companies used vinyl formulations trademarked as Metrolite, Merco Plastic, and Sav-o-flex, but these were mainly used to produce "unbreakable" children's records and special thin vinyl DJ pressings for shipment to radio stations.[21]
En plein air Artists have long painted outdoors, but in the mid-19th century, working in natural light became particularly important to the Barbizon school, Hudson River School, and Impressionists.
Marcus Álvarez
Gilbert Gottfried In March 2011, Gottfried made a series of jokes on his Twitter account about the