These 15.5 lb. archival vellum pads from Borden & Riley offer a bright white, very translucent surface known for its exceptional dimensional stability. This paper is rated as professional quality, is PH neutral and contains 100% Cotton rag, long fiber paper. Transparentized during the manufacturing process for exceptional dimensional stability and accuracy. Contains no fugitive oils or resins, crack-resistant, durable & archival. Excellent for archiving plans made from pen, graphite, marker, photocopies, and laser prints. Made in the USA. 16lb / 60gsm, smooth, transparent natural white, 50 sheet pads. Creative Process: Stage 2 Fine Art Rendering.