\jә-▐ pan\ n (1688) Glossy black enamel, either air drying or baking, based on asphaltum and drying oil. Japan should not be confused with black enamels which are produced by pigmentation and do not have an asphaltum base. Also known as Black Japan. (Ash M, Ash I (1982–1983) Encyclopedia of plastics, polymers, and resins, vols I–III. Chemical Publishing, New York).