Using the Australian Art Sales Digest - Definitions of categories used to classify media.

Categories
For each artist included, the works offered for sale are listed in one of the five following categories:
Paintings	Oils, synthetic polymer, acrylic and other media applied to canvas, board, canvasboard and similar support.
Works on paper	Most commonly watercolours, or watercolours used with another medium such as watercolour with wash or watercolour and ink, and also biro, chalk, charcoal, conte, crayon, enamel, gouache, ink, pastel, pencil, Ripolin, tempera or wash.
Prints and Graphics	Engravings, etchings, lithographs, screenprints, linotypes, woodcuts, photographs, drypoints, aquatints, and other similar processes.
Photographs	All types of photographs
Objects	Ceramics, sculpture, installations, artefacts and other three dimensional objects, including pottery and porcelain, and sculpture in all types of materials, and works by Australian aboriginal artists in wood with either carved or painted decoration, including woomeras, boomerangs and shields.