Encaustic painting, also known as hot wax painting, involves using heated beeswax to which colored pigments are added. The liquid or paste is then applied to a surface—usually prepared wood, though canvas and other materials are often used. The simplest encaustic mixture can be made from adding pigments to beeswax, but there are several other recipes that can be used—some containing other types of waxes, damar resin, linseed oil, or other ingredients. Pure, powdered pigments can be used, though some mixtures use oil paints or other forms of pigment.[1]
Metal tools and special brushes can be used to shape the paint before it cools, or heated metal tools can be used to manipulate the wax once it has cooled onto the surface. Today, tools such as heat lamps, heat guns, and other methods of applying heat allow artists to extend the amount of time they have to work with the material. Because wax is used as the pigment binder, encaustics can be sculpted as well as painted. Other materials can be encased or collaged into the surface, or layered, using the encaustic medium to stick them to the surface.
A completely unrelated type of "encaustic painting", not involving wax at all, is found in British ceramics, after Josiah Wedgwood devised and patented the technique in 1769. This was a mixture of ceramic slip and overglaze "enamel" paints used to imitate ancient Greek vase painting, and given a light second firing. Usually the vessel was black and painted in the red of red-figure painting. The technique was copied by other British potteries.[2] Encaustic tiles are not painted at all, but effectively inlaid with contrasting colours of clay for a polychrome pattern.