Our Inkjet Vellum is long lasting and environmental friendly. Archiving 20Lb Transparentized Vellum is produced from 15% Cotton fiber. When printing with Inkjet Vellum always print on the preferred side of the media. The preferred side is always on the outside of the roll unless if it is noted. Manage print media by the edges to prevent dirt and oils from contaminating the print area. Excellent results can achieved when operating at 65-85 F and 25-70% Humidity. Always store laser/xerographic media in a cool dry place. If storage state changes from printing state, permits the product to adjust before starting to print.Specification:Properties: 20 Lb / 75gsmOpacity: 50%