[Clark Derbes, Untitled, Encaustic and Mixed Media, courtesy Ann Connelly]
Encaustic is a method of painting developed by the ancient Greeks that involves mixing pigment with hot beeswax. Or as The Met simply states: Encaustic is Greek for "burnt in."
Artists who like the technique typically apply color to a surface, such as a board, play around with their composition, and then use heat to fuse the entire piece into one lustrous work of art. But before the colored wax is permanently hardened, other materials ranging from paper to metal can be easily incorporated. That is why it's fairly common to see "encaustic" and "mixed media" used together in the description of one painting, as in Clark Derbes' above. An artist famous for encaustic works is Jasper Johns.
To see more of Derbes' work visit Ann Connelly's Baton Rouge gallery.