Pigment Sticks® without pigment. They are ideal for glazing colors, can be worked directly into a color to increase the color's transparency, or used to blend colors together on the surface. Available with drier and without. Our sticks with drier contain a small amount of Cobalt Drier added to speed up the drying time. The use of a Cobalt Drier can affect color, so best use is to work colors on top of it after it has been laid down on the surface.