Clearprint Architectural Title Block Drafting Vellum Sheets are made from oil-treated, 100% cotton rag content paper. The archival quality, strength, erasability and redraw characteristics of this 100% new cotton fiber vellum make it ideal for manual drafting or for use with with colored pencils, markers and more. Its exceptional characteristics stand up to extended exposure to age, atmosphere, heat and light. Translucency of this 16 lb. media is achieved without the use of solvents, and the uniform surface is ideal for ink and pencil.