This Alvin Vellum product is of 16 lb. weight (68gms/meter2) sturdy 100 percent new cotton rag fibers. The large, 24 x 36 sheets come 100 sheets to a package, and are available either blank or with a title block and border printed on each sheet with non-repro grids. This paper has a fine grain surface that accepts both pencil and pen equally well. The sturdy cotton fiber insures the paper won’t tear even when you erase it, nor will it smear, smudge or leave ghost images. The high quality of the paper also insures it won’t turn yellow or show its age. It’s perfect for tracing detailed projects you need to reproduce, and it can be saved for years, due to its 100 percent cotton content.