Oil pastel is a painting and drawing medium with characteristics
similar to pastels and wax crayons.
Unlike "soft" or "French" pastel sticks, which
are made with a gum or methyl cellulose binder, oil pastels consist
of pigment mixed with a non-drying oil and wax binder. The surface
of an oil pastel painting is therefore less powdery, but more difficult
to protect with a fixative. After application to a support, the
oil pastel pigment can be manipulated with a brush moistened in
turpentine or linseed oil.
Oil pastels were invented in 1924 by the Japanese teachers Rinzo
Satake and Shuku Sasaki to give pupils greater freedom to express
themselves by means of a cheap, colorful and easily appliable medium.
They are the founders of the Sakura Cray-Pas Company.