Bee Paper - Heavyweight Sketch Vellum - Pad - 18x24 - Bee Paper Heavyweight Sketch Vellum is a hard, clean, natural white 90 lb. (147 gsm) recycled sheet with excellent erasing qualities. Aquabee Heavyweight Sketch Vellum has a textured surface that has excellent tooth. Use Bee Paper Heavyweight Sketch Vellum for use with pen, ink, pastel, charcoal and pencil. Inspiring paper values that enhance techniques in every art medium. The Aquabee line of artist papers are among the most widely known in the United States. This Tape Bound Pad Contains: 40 Sheets of 18 x 24 inch Extra Heavy Sketch Vellum.