Paper × 841 mm). A1 is half the size of a sheet of A0 (i.e., 594 mm × 841 mm), such that two sheets of A1 placed side by side are equal to one sheet of A0. A2 is half the size of a sheet of A1, and so forth. Common sizes used in the office and the home are A4 and A3 (A3 is the size of two A4 sheets). The density of paper ranges from for tissue paper to for some speciality paper. Printing paper is about . Paper may be classified into seven categories: Some paper types include:
Paper towel Paper towel A kitchen roll (or kitchen paper) is an absorbent [towel] made from [tissue paper] instead of cloth. Unlike cloth towels, paper towels are disposable and intended to be used only once. Paper towels soak up water because they are loosely woven which enables water to travel between the fibers, even against gravity (capillary effect). Paper towels can be individually packed (as stacks of folded towels or held coiled) or come in rolls. Paper towels have similar purposes to conventional towels, such as drying hands, wiping windows and other surfaces, dusting and cleaning up spills. In 1907, the Scott