Dec 03, 2004 · TEMPERA'S ARE EMULSIONS, water and oil plus the stabilizer. The first tempera was made about 1000 A/D, first with mastic, than linseed oil. The ratio's went like this; one part egg, one part mastic or oil, OR, two parts egg, one part oil, one part mastic. More egg made it water based, more oil made it oil based.
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