Tempera

The word "tempera" comes from the Latin "temperare". - to mix.
In the past, under the name tempera was understood a technique whose binder was an egg.
In scientific nomenclature, under the name "tempera" is understood a technique whose binder is a natural or artificial emulsion.
Until the 15th century, that is, until the invention of the oil technique, tempera was the most popular technique in Europe. Since the 16th century it has been used less and less, now rather used in decorative painting. Today it is most common in Russia and Greece (natural emulsion).
Since the 19th century there has been a return to tempera, but based on artificial emulsion.