Fresco painting, method of painting water-based pigments on freshly applied plaster, usually on wall surfaces. ... The colours, which are made by grinding dry-powder pigments in pure water, dry and set with the plaster to become a permanent part of the wall.
Explanation:
There are three main types of fresco: buon, secco, and mezzo. The classic approach is the buon or “true” fresco, which involves painting onto freshly mixed and applied plaster. The wet plaster acts as the binding medium, so only water and pigment are needed.
