Clearprint 1000H Drafting Vellum is said to be America's finest technical art paper. Its surface is transparent, smooth, and uniform. Pen and pencil lines come out sharp and clean with no feathery edges and no ghosting. Erase, redraw, and then erase again. This remarkable paper retains its strength, stability, transparency, and printing qualities under exposure to heat, light, and atmosphere. It will not become yellow, brittle, or opaque with age. Clearprint 1000H is available in a variety of sizes, and in rolls. It is made of 100% cotton fiber, made transparent without the use of solvents. Its 16 lb (60 gsm) weight is equivalent to a standard bond paper.