An ancient painting medium in which natural pigments are mixed in a water soluble binder–usually egg yolk and water, but also casein (milk) animal glue or wax–and used to apply paint to dry plaster or stone or gesso.
An ancient painting medium in which natural pigments are mixed in a water soluble binder–usually egg yolk and water, but also casein (milk) animal glue or wax–and used to apply paint to dry plaster or stone or gesso.