Natural white, 25% rag content, medium weight (17 lb., .003" thickness) 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.