Drawing paper, also known as CARTRIDGE paper, is a type of heavy-weight paper that is used for drawing and sketching. It is usually made from a combination of wood pulp and cotton fibers, which makes it strong and durable. The paper is usually white in color and has a smooth surface, making it ideal for use with pencils, charcoal, pastels, and other drawing media. CARTRIDGE paper is available in a variety of sizes and thicknesses, making it suitable for a range of artistic projects.