The material, must first realize that to the crayon is one translucent material, the manufacture compared to having the very big difference by the graphite and the clay according to the different proportion mix's sketch pencil.

First is the color lead quality, the color lead divides greasiness and water-soluble, the greasy pencil lead is hard, the color is pale, compared with suitable picture colored sketch, but not the easy counter-overlapping color, to recommend that do not use the too smooth paper to carry on does painting.

First is the color lead quality, the color lead divides greasiness and water-soluble, the greasy pencil lead is hard, the color is pale, compared with suitable picture colored sketch, but not the easy counter-overlapping color, to recommend that do not use the too smooth paper to carry on does painting.