Blending Mediums are made from the Pigment Stick base 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. The blending medium with drier contains a small amount of Cobalt Manganese 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. Available in sticks and jars.