Answer: the painting is water based pigments on freshly applied plaster, usually on wall surfaces. The colors are made by grinding dry powder pigments in pure water, they dry and set with the plaster to become a permanent part of the wall.
Holds that from the inside, any system looks natural and coherent, but it is in fact filled with unseen contradictions, myths, or stereotypes. Jacques Derrida introduced the idea of deconstruction.