 
 <prompt> Styli wey dey make from sapphire and osmium alloy don replace those wey dey make from wetin? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: In 1931, RCA Victor bring out their Victrolac compound wey dey based on vinyl as material for some special records. By the end of the 1930s, vinyl don dey popular because e dey light, no dey break easily and e no get plenty noise for surface. But for normal 78 rpm records, e cost too much and e fit spoil quick if you use heavy pickups and old steel needles wey dem dey use for home record players. During Second World War, US Armed Forces produce plenty 12-inch vinyl 78 rpm V-Discs for soldiers wey dey fight for war. After the war, dem begin dey use vinyl well well as new record players with light crystal pickups and sharp styli made of sapphire or osmium alloy dey plenty. For late 1945, RCA Victor start to dey sell special transparent red vinyl De Luxe pressings of some classical 78s, but e dey cost well well. Later, Decca Records bring out vinyl Deccalite 78s, while other record companies come up with vinyl like Metrolite, Merco Plastic and Sav-o-flex, but dem mainly use am to produce children's records wey no dey break easily and special thin vinyl DJ pressings wey dem dey send go radio stations. 