Seth Cole vellum drafting paper rolls. Medium-weight 16 lb. basis vellum papers 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. Seth Cole tracing paper advantages include: leave no ghosts, smudges, or smears when erasing; high tensile strength prevents tears; archival quality resists aging and yellowing. 2" core. Seth Cole vellum papers are made in the USA.