Lopold-Jules-Joseph Gly, employed at Svres from 1850-88 as a sculptor and modeller, is celebrated for developing and perfecting the pte-sur-pte technique. He and his student Marc Louis Solon were recognized for their achievement in the 1862 London International Exhibition. See Bernard Bumpus, Pte-sur-Pte, The Art of Ceramic Decoration, 1849-1992, 1992, pp. 11-34; Anon. sale, Sotheby's, New York, 24 June 1999, lot 260; and Anon. sale, Christie's 11 September 1997, lot 99 and 100 for several examples of this artist's work.