Painting a pointillist piece is a slow and painstaking process. He was known for amazing devotion and concentration. Materials Used Pointillism is usually done in oil, but it's not required. Oil paint is used because it's thick and doesn't bleed or run. The idea behind pointillism is to not physically mix colors, so if the paint bled it would not be good.
Many pigments are minerals.
Oil is added because it makes the pigment easier to apply and it holds the dry particles of pigment together. Artists used to hand-mix their own paint, but now the mixing is usually done mechanically. The first step in mixing the paint is grinding the pigment so that it gets a good fine consistency and color. There are different kinds of grinding machines for different pigments. Some machines have electric motors which can go at different speeds and strengths, depending on the pigment.