Clearprint 24 lb.(90gsm) vellum drawing paper features a transparent durable surface, appropriate for a wide variety of media including most art markers; available in 50-sheet pads. Clearprint 48 lb. (180gsm) Heavy vellum drawing paper is the thickest vellum in the Clearprint line. Each sheet has a transparent, durable surface for working with media including alcohol and acrylic-based markers and gouache; available in 25-sheet pads. Clearprint vellum drawing papers are quality-made in the USA. SOLD ONLY IN PACKS OF 6.