These are paint materials as used in Roman times. some examples: Purple was made out of the molusk Myrex Brandaris (very expensive). Black was made by burning ivory Ochre was used for yellow Red could be obtained from ochre by cooking it in a sealed vessel. Green came from the minerals glauconite or celodonite (very expensive) White was made with calcium carbonate Blue was made out of soaked sand, flowers of soda and copper
