Finely milled pigments are used in making these transparent watercolors for greatest brilliance and purest color intensity. Even with full color strokes of the brush, the colors are transparent enough to show structure lines of the under drawing. Opaque watercolors provide intense, brilliant colors that dry to a velvety finish and can be mixed to produce a variety of shades, retaining rich color values. They can also be diluted for use as transparent washes. All of these full-pan sets come with a size 4 red sable round brush.