Cellulose acetate butyrate dope

A form of finishing material for fabric-covered aircraft made of a cellulose fiber dissolved in a mixture of acetic and butyric acids. Plasticizers, solvents, and thinners are mixed with the film base to give it the proper working qualities. Cellulose acetate butyrate dope, also called CAB dope or, more simply, butyrate dope, has become more popular than the older cellulose nitrate dope because it is far less flammable than nitrate dope.