imitation and copy
Both of these terms are applied to work which is un-original in nature. In vase painting imitations of the red-figure masters are common, and Beazley sometimes describes 'school-pieces' as imitations. Painters have been known to imitate another's style, technique, and subject matter - sometimes all three when the work is a true copy. Beazley has identified imitations and copies of certain painters' works even outside of their workshops and schools.