This 12 color set is designed for traditional Chinese painting techniques. It is water resistant after drying when wet mounting on absorbent paper, yet fully water soluble like a traditional watercolor. They are designed for traditional Chinese painting techniques but they can be mixed with other watercolors to achieve interesting color combinations. These watercolors can be fully reworked like any watercolor BUT it takes a little longer because the binder is different and much stronger. Some of the colors in this set are semi transparent and some are opaque. Traditional Chinese colors come with the plant based colors which are semi transparent and the mineral based colors are opaque. These paints are smooth in consistency and are finely ground. The colors conform to ASTM D-4236.