Natural white, medium weight, 17 lb. tracing papers treated with permanent synthetic resins for high transparency. Paper will not yellow and the resins will not bleed to other papers. Slightly grained surface is suitable for ink, pencil, crayon, or watercolors, has excellent fold and tear strength, and produces sharp, high-quality white print Diazo reproductions and clear photocopies on all standard office reproduction machines. A moderately priced tracing and drawing medium. All packages include top cover, heavy backing, and are poly-sealed. Alvin has been the professional's choice for drafting tools and drawing supplies for over half a century. Since 1950, we have brought quality and value to our customers. Our tools help bridge the gap between ideas and innovations. We are known for our wide selection of high quality tools at a fair price.