This 20 lb. Premium bond is your media of choice for high volume plotting, printing and duplicating. Cost-effective for high-volume printing. Excellent for everyday use and ideal for printing CAD and engineering drafts. The bright white base provides high contrast and the surface finish is optimized for all Laser, LED and xerographic plotters and duplicators. Recommended Printing Practices: Remember to always print on the preferred side of the media. The preferred side is always on the outside of the roll unless otherwise noted. Handle print media by the edges to prevent dirt and oils from contaminating the print area. Best results are achieved when operating at 65-85°F and 25-70% Humidity .STORAGE: Always store laser/xerographic media in a cool dry area. If storage conditions vary from printing conditions, allow the product to adjust before beginning to print.Specification:Properties: 20 Lb / 75gsmOpacity: 88%Brightness: 92CORE SIZE: 3.0