Editing Phonograph record (section)

===78 rpm materials===
The production of shellac records continued throughout the 78&nbsp;rpm era, which lasted until 1948 in industrialized nations.<ref>Read, Oliver; Welch, Walter L., ''From Tin Foil to Stereo'', U.S., 1959</ref>

During the Second World War, the United States Armed Forces produced thousands of 12-inch vinyl 78&nbsp;rpm [[V-Disc]]s for use by the troops overseas.<ref>''V-Disc and Armed Forces Radio Catalogue'', Blue Goose Publishers, St Louis</ref> 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 vinylite pressings of some [[RCA Red Seal Records|Red Seal]] classical 78s, at a ''de luxe'' price. Later, [[Decca Records]] introduced vinyl Deccalite 78s, while other record companies used various 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.<ref>''The Amazing Phonograph'', Morgan Wright, 2002 Hoy Hoy Publishers, Saratoga Springs, NY p. 65</ref>