encaustic

Encaustic painting, also known as hot wax painting, involves using a heated encaustic medium to which colored pigments have been added for creating artworks. Molten medium is applied to a surface—usually prepared wood, though canvas and other materials are sometimes used. The simplest encaustic medium could be made by adding pigments to wax, though recipes most commonly consist of beeswax and damar resin, potentially with other ingredients. For pigmentation, dried powdered pigments can be used, though some artists use pigmented wax, inks, oil paints or other forms of pigmentation.Metal tools and special brushes can be used to shape the medium as it cools. Also, heated metal tools, including spatulas, knives and scrapers, can be used to manipulate the medium after it has cooled onto the surface. Additionally, heat lamps, torches, heat guns, and other methods of applying heat are used by encaustic artists to fuse and bind the medium. Because encaustic medium is thermally malleable, the medium can be also sculpted. And/or, materials can be encased, collaged or layered into the medium.
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. Encaustic tiles are not painted at all, but effectively inlaid with contrasting colours of clay for a polychrome pattern.

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