3 See also
Main article: Paper tissue
Paper is made from either virgin or recycled paper pulp  which is extracted from wood or fiber crops. They are sometimes bleached during the production process to make the color whiter. It is not uncommon for rolls of paper towels to include intricate colored images on each square (such as flowers or teddy bears). Resin size is used to improve the wet strength. Patterns of shapes such as circles or diamonds are often imprinted into the paper towels to help it hold moisture. Manufacturers use the pattern of the material, microscopic spaces within the pattern, and a type of cellulose in the fibers in order to maximize absorption. Most rolls are manufactured with two layers of paper, but different types can have more layers. They are classified by their key properties such as strength, absorbency, weight, and thickness. Paper towels are packed individually and sold as stacks, or are held on a continuous roll. Colored paper towels were introduced 30 years ago[when?] and come in two distinct classes, domestic and institutional.
Paper towels were first made by Arthur Scott from a cartload of rejected toilet paper. He...