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Umber

physical science Maturity 7-9 Next article →

Umber is a natural earth pigment used by artists for centuries. It is a brownish color that can shift between shades of yellow, red, and green. This pigment is made of iron oxide and manganese oxide found in clay. It is highly valued because of its warm tone and versatile colors. Artists also appreciate its quick drying abilities and its high opacity. Opacity refers to its strong hiding power when applied to a surface.

Jules Bastien-Lepage - Pas Mèche (Nothing Doing) - Google Art Project
Jules Bastien-Lepage - Pas Mèche (Nothing Doing) - Google Art Project

Creating umber involves several specific steps to prepare the earth. First, the material is mined from underground mines or open pits. Once extracted, the earth is ground into a very fine powder. This powder must be washed to remove any impurities from the mixture. The final color depends on the proportions of the minerals inside. For example, the amount of iron and manganese changes the specific hue.

Lascaux II
Lascaux II

There are two main types of umber: raw and burnt. Raw umber is the natural form of the pigment. It is often used for ceramics because it is less expensive. You can change the pigment through a process called calcining. Calcining means heating the pigment to high temperatures. This process dehydrates the iron oxides within the material. It partially changes them into a more reddish substance called hematite. The result is burnt umber, which is a much more intense color. This darker version can look almost black and is used in both oil and watercolor painting.

Mona Lisa, by Leonardo da Vinci, from C2RMF retouched
Mona Lisa, by Leonardo da Vinci, from C2RMF retouched

Humans have used earth pigments like umber for a very long time. Scientists have identified ochers in the Altamira caves in Spain. They have also found them in the Lascaux Cave in France. There is a debate about where the name "umber" comes from. Some believe it refers to Umbria, a geographic location. Other scholars suggest it comes from the Latin word "umbra," which means shadow. This name is fitting because the color is excellent for creating shadows.

Lascaux II
Lascaux II

Umber's popularity grew significantly during different historical periods. In the late 15th century, its use in Europe began to increase. During the Renaissance, artists recognized that it was inexpensive and easy to find. It was also very stable and inert, meaning it does not react easily with other substances. In the 18th century, it became a standard color in European palettes. Dutch landscape painters used it frequently during this time.

Jules Bastien-Lepage - Pas Mèche (Nothing Doing) - Google Art Project
Jules Bastien-Lepage - Pas Mèche (Nothing Doing) - Google Art Project

During the Baroque period, umber played a vital role in the chiaroscuro style. Chiaroscuro is a technique that uses intense contrasts between light and dark. Umber allowed painters to create deep, dark shadows to make light appear brighter. It was also used in underpainting. This is a technique where artists use a base color to build up layers. Artists could create various earthy tones by layering different colors over an umber base. Leonardo da Vinci famously used umber in the Mona Lisa for hair and clothing. He also used it in The Last Supper to create outlines and shadows.

Mona Lisa, by Leonardo da Vinci, from C2RMF retouched
Mona Lisa, by Leonardo da Vinci, from C2RMF retouched

Despite its usefulness, some artists in the 17th century criticized the pigment. The British painter Edward Norgate called it a "foul and greasy color." A Spanish painter named Antonio Palomino described it as "very false." Another painter, Jan Blockx, believed it should not be used by conscientious painters. By the end of the 19th century, the Impressionist movement began to reject natural pigments. They preferred to mix their own browns using synthetic dyes like cobalt blue and emerald green. In the 20th century, most natural umber was replaced by synthetic versions made of iron oxide and manganese oxide.

Jules Bastien-Lepage - Pas Mèche (Nothing Doing) - Google Art Project
Jules Bastien-Lepage - Pas Mèche (Nothing Doing) - Google Art Project
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