Artist 
Writer Pointillism
Pointillism is a technique of painting in which you paint a lot of tiny dots next to each other, which combine to form a picture. Theoretically, mixing colors together loses the saturation, but when two colors are right next to each other your eye mixes them in a process called, "optical mixing". Using optical mixing rather than physical mixing can create a brighter picture.
Seurat is one of the most famous pointillist painters.
See the Brushwork Building Block for more information.