Paper used in furniture design. Watercolor paper has a long history of production and use. The thickness of paper is often measured by caliper, which is typically given in thousandths of an inch in the United States and in micrometers (µm) in the rest of the world. Paper may be between thick. Paper is often characterized by weight. In the United States, the weight assigned to a paper is the weight of a ream, 500 sheets, of varying "basic sizes", before the paper is cut into the size it is sold to end customers. For example, a ream of 20 lb,
Inkjet paper include coatings engineered to receive and hold ink. Fine art papers are usually made of rag pulp (100% cotton being the most common) but may also be have an alpha-cellulose base. Some descriptions and comparisons of fine art inkjet papers are here, here, here, and here. Some fine art papers are mold made, while others are machine made, and may vary considerably in surface texture. Many fine art papers are available in pre-cut sheets or in rolls. Standard office paper has traditionally been designed for use with typewriters and copy machines, where the paper usually does not get wet. With