Howard Greenwald, who helped guide LANSCO Colors into a force in pigment distribution, died August 9, 2009.      Mr. Greenwald was a 1940 graduate of the Wharton School of the University of Pennsylvania. He began supplying pigments, fillers and additives to the paint, plastics and ink industry in 1952 as sales manager of Smith Chemical and Color Co. in Brooklyn, NY in 1952. He left Smith in 1965, and became an independent sales representative until partnering with Werner Klugman in 1975 to pur...