Hadra <p>Ancient Greek visual works comprising pottery objects having primarily black decoration on a red ground, with figures reserved in red. Details were painted on the red of the background clay, allowing overall more sophisticated works than with black-figure vase paintings. Works appeared in Athens ca. 530 BCE.</p> <p>Source: Art &amp; Architecture Thesaurus</p> <p>http://vocab.getty.edu/page/aat/300107290</p>