This drawing cartridge paper is a natural white color, acid-free and archival quality to prevent yellowing. The surface is internally and externally sized to insure long term stability. Available in medium grain and smooth grain finishes. Medium grain is a textural surface ideal for pencil, colored pencil, pastel and charcoal. Smooth grain features an even surface, ideal for pens and ink, pencil and colored pencil. Available in wire-bound pads that contain 25 150gsm sheets each.