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Tempera

arts Maturity 7-9 Next article →

Tempera is a permanent and fast-drying painting medium. It consists of dry pigments mixed with a water-soluble binder. This binder is a substance that holds the color particles together. The term comes from the Italian phrase "dipingere a tempera," which means to paint in distemper. It also relates to the Late Latin "distemperare," meaning to mix thoroughly.

Duccio The-Madonna-and-Child-128
Duccio The-Madonna-and-Child-128

Artists value tempera for its durability and color stability. Unlike oil paints, tempera colors do not darken, yellow, or become transparent as they age. This makes it a reliable choice for works meant to last for centuries.

The most famous version is egg tempera. To make it, an artist must carefully prepare the egg yolk. They discard the egg white and the yolk membrane. The membrane is punctured so the liquid inside can drain into a container. This yolk is then diluted with a liquid, usually water. Some historical recipes use white wine or a small amount of vinegar. Vinegar acts as a preservative, though too much can discolor pigments like ultramarine.

Tarlati-polyptych-Pietro Lorenzetti Pieve di santa Maria Arezzo
Tarlati-polyptych-Pietro Lorenzetti Pieve di santa Maria Arezzo

The artist mixes the yolk with a roughly equal volume of powdered pigment. They must constantly adjust the mixture to balance a "greasy" and "watery" consistency.

There are several distinct types of tempera based on the binder used. Egg tempera is the classical standard. Casein paint is another type, which uses milk protein as the binder. There is also polyvinyl acetate tempera, which uses a synthetic binder called PVA. Some people call distemper "tempera," but it actually uses binders like cornstarch or gum arabic. This distemper is more similar to gouache in its visual effect.

Wall painting - offering bearers and a sacrifice scene Tempera painting on clay and straw - Museo Egizio, Turin S 14354 12 p02
Wall painting - offering bearers and a sacrifice scene Tempera painting on clay and straw - Museo Egizio, Turin S 14354 12 p02

Another variation is tempera grassa. This is created by adding oil to the egg yolk in a ratio of no more than 1:1. It offers some color effects of oil paint while remaining water-soluble.

Tempera has a deep and ancient history. The earliest known egg tempera examples are prehistoric murals in Sardinia from 3400–2700 BCE. Scientists have also found egg tempera in murals from the Palace of Nestor in Pylos, dating to 1200 BCE. In India, high-quality tempera art was created in the Bagh Caves between the 4th and 10th centuries. In Europe, tempera was the primary medium for panel paintings and illuminated manuscripts. It was the dominant method used in the Byzantine world and through the Early Renaissance.

Niccolò Semitecolo - Two Christians before the Judges
Niccolò Semitecolo - Two Christians before the Judges

Even Michelangelo used egg tempera for most of his surviving panel paintings.

The technical requirements of tempera are quite strict. Because the paint is not flexible, it must be used on stiff, rigid surfaces. If an artist tries to use canvas, the paint will crack and chip away. Instead, they use wood panels or hard boards like MDF. The surface is often prepared with an absorbent ground called gesso.

Duccio The-Madonna-and-Child-128
Duccio The-Madonna-and-Child-128

Because the paint dries so rapidly, artists cannot apply it in thick layers. They instead use a precise technique called cross-hatching. This involves applying many small, thin, semi-opaque or transparent layers of paint. This process results in a smooth, satin, or matte finish.

While oil paint eventually replaced tempera in popularity, the medium saw many revivals. In the 19th and 20th centuries, groups like the Pre-Raphaelites rediscovered the technique. In America, many artists used it, including the Regionalist Andrew Wyeth and the science fiction artist John Schoenherr. In India, the Bengal school of artists used tempera as a primary way to express themselves. Artists like Jamini Roy and Ganesh Pyne helped establish it for a new age of Indian art.

Niccolò Semitecolo - Two Christians before the Judges
Niccolò Semitecolo - Two Christians before the Judges

It remains a traditional medium for painting Orthodox icons in Greece and Russia.

Understanding tempera also requires awareness of the materials used. Many traditional pigments are highly toxic. For example, cinnabar contains mercury, orpiment contains arsenic, and lead white contains lead. Modern artists often use synthetic pigments to stay safe, but they must still be careful not to breathe in pigment dust. Furthermore, egg tempera cannot be stored in tubes like modern paints. Once prepared, it must be used immediately. This is why tubed egg tempera is actually tempera grassa, as it requires oils and preservatives to stay liquid in a container.

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File:Duccio The-Madonna-and-Child-128.jpg
Duccio The-Madonna-and-Child-128.jpg
File:Niccolò Semitecolo - Two Christians before the Judges.jpg
Niccolò Semitecolo - Two Christians...
File:Wall painting - offering bearers and a sacrifice scene Tempera painting on clay and straw - Museo Egizio, Turin S 14354 12 p02.jpg
Wall painting - offering bearers and a...
File:Tarlati-polyptych-Pietro Lorenzetti Pieve di santa Maria Arezzo.jpg
Tarlati-polyptych-Pietro Lorenzetti Pieve...
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