Answer:
Applying color pigments to wet plaster
Explanation:
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.
I think that the answer is coins.
Copper plate ••
Printing plate
Master plate
Money plate
The artist is using scale.
