PLATINUM DAY PACKS THE HOUSE More than 350 people attended the premier of Platinum Day, a technical symposium designed to show jewelry professionals how to work more efficiently with the world's most precious metal. Manufacturers, retailers, jewelry designers, wholesalers and trade casters attended the event, held at the Holiday Inn Crown Plaza, New York, N.Y. The symposium was sponsored by the Manufacturing Jewelers and Silversmiths of America and the Platinum Guild International. "Platinum Day received tremendous response from the manufacturing community, demonstrated by the number and quality of companies who attended and their commitment to stay throughout the entire day's program," said MJSA President Matthew Runci. Topics and speakers were "Platinum Mill Products and Brazing," presented by Torrance Hoover of Hoover & Strong, Richmond, Va.; "Choosing Platinum Alloys to Max