37 REPRODUCING MATERIALS, ESPECIALLY TRACING VELLUM, TRACING CLOTH AND MATTE SURFACED AND TRANSLUCENT SHEET MATERIAL FOR TRACING; TRANSPARENT SHEET MATERIAL USED FOR PREPARING TRANSLUCENT ORIGINALS FOR TRANSPARENCIES, TRANSLUCENT TYPING, WRITING, PRINTING, BOND PAPER; MOUNTS FOR PHOTOGRAPHIC PICTURES, SLIDES, AND TRANSPARENCIES; AND PHOTOGRAPHIC ALBUMS