Seth Cole tracing vellum is a medium-weight 16 lb.-basis vellum paper manufactured from 100% new cotton rag fibers with a non-fading blue-white tint. Finely-grained surface that is excellent for pencil and pen receptivity. Advantages include: leaves no ghosts, smudges, or smears when erasing; high tensile strength prevents tears; resists aging and yellowing. 18" x 24" with architectural title block along right side. Identical to discontinued Alvin vellum; similar to Clearprint. Seth Cole 100 rag vellum tracing papers are made in the USA.