Kraft paper is a tough, water-resistant packaging paper. It is brown and has a wide range of uses. It is often used to make paper bags, envelopes, workbooks, record sleeves, files and sandpaper. The basis weight range is from 80 g/m2 to 120 g/m2, and there are differences between web and flat paper, single-sided light, double-sided light, and stripe. The main quality requirements are flexibility and strength, high burst resistance, and can withstand greater tension and pressure without breaking. Kraft paper has high tensile strength, including single gloss, double gloss, stripes, and no grains.