1.Oil pastel painting effect, perfect covering and mixing, make more vivid and realistic painting. 2.Freely color mixing, break normal procedure of painting, inspire full imagination. 3.Water soluble, exquisite gouache can be painted with water. 4.Can be used as pencils to draw finelines and subtle details. 5.Convenient to carry, with wide scope of application. 6.Scope of application : line drawing, sketching, light colour performance.