- tempera painting
Painting executed with ground pigment mixed with a water-soluble material, such as egg yolk, gum, or wax.The special ground for tempera painting is a rigid wood panel coated with thin layers of gesso, a preparation usually made of plaster of Paris and glue. Tempera paint is resistant to water and allows overpainting with more colour; the thin, transparent layers of paint produce a clear, luminous effect. The exclusive medium for panel painting in the Middle Ages and early Renaissance, it was largely superseded in the 15th century by oil paint.
* * *painting executed with pigment ground in a water-miscible medium. The word tempera originally came from the verb temper—that is, “to bring to a desired consistency”; dry pigments are made usable by “tempering” them with a binding and adhesive vehicle. Such painting was distinguished from fresco painting, the colours for which contained no binder. Eventually, after the rise of oil painting, the word gained its present meaning.The standard tempera vehicle is a natural emulsion, egg yolk, thinned with water. Variants of this vehicle have been developed to widen its use. Among the man-made emulsions are those prepared with whole egg and linseed oil, with gum, and with wax.The special ground for tempera painting is a rigid wood or wallboard panel coated with several thin layers of gesso, a white, smooth, fully absorbent preparation made of burnt gypsum (or chalk, plaster of Paris, or whiting) and hide (or parchment) glue. A few minutes after application, tempera paint is sufficiently resistant to water to allow overpainting with more colour. Thin, transparent layers of paint produce a clear, luminous effect, and the colour tones of successive brushstrokes blend optically. Modern tempera paintings are sometimes varnished or overpainted with thin, transparent oil glazes to produce full, deep-toned results, or they are left unglazed for blond effects.
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