Pastel Board
Illustration boards are surfaces made by giving paper for different purposes with specific usage such as watercolor paper or color paper a backing made of thick paper (cardboard or posterboard). In addition to being a medium for illustrations and renderings, it can also be used to mount for presentations or as a mat for framing. Also, because it is an easy process to make cut outs from thinner boards, they are also used for architectural and other three-dimensional models.