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Cere Colla is an water-soluble painting medium made from an emulsion of molten beeswax and glue. Mixed with wet or dry aqueous pigments, the medium can be applied at room tempurature to variety of substrates such as wood, stone, and canvas. Modern wax/glue emulsions may include ammonia-saponified beeswax mixed with glue, gum, or casein. Cere colla

Cera Colla also refers to paintings done in this medium.

Cited in the medieval text Mappae clavicula, Cera dates at least back to 1500 BCE

HISTORY
1500 B/C- The Eighteenth Dynasty of Egypt founded the city of Ammonium two hundred miles east of Memphis. Here was the world's only supply of ammonia, from the remains of a long extinct mollusk. A shrine was made there to their god Ammon. Ammonia made wax and oil water soluble, wax soap paints were developed, it dried insoluble to water, this paint was called Cera Cola. The Egyptians loved paint, it must have been a colorful empire.

Cera Colla paintings are long lasting, and examples from the 1st centuries AD still exist. Egg tempera was a primary method of painting until after 1500 when it was superseded by the invention of oil painting. A paint consisting of pigment and glue size commonly used in the United States as poster paint is also often referred to as "tempera paint," although the binders and sizes in this paint are different from traditional tempera paint