Resin bound paving is a mixture of resin binder and aggregate. An adhesive "binder" between the oxide and the substrate holds the two sides together. Pastel sticks or crayons consist of powdered pigment combined with a binder. Most pencil cores are made of graphite powder mixed with a clay binder. Stucco or render is a construction material made of aggregates, a binder, and water. Thermoplastic mechanisms&colon; Some films are formed by simple cooling of the binder. The insensitivity is attributed to using a large amount of binder in its composition. Gelatin has many qualities that make it an ideal photographic binder. By adding a hybrid extra vegetable based binder the liquid lino sets overnight. Bricklayers typically make mortars using a mixture of sand, a binder, and water. Wheat flour has been used as a strength enhancing binder. The product is dried and mixed with egg albumen, which acts as a binder. Chitosan is marketed in a tablet form as a "fat binder". Sending books to the library binder is a mass production process. Linseed oil was also increasingly used as an inexpensive binder.