A colorless medium that can be mixed with water mixable oil paint in any ratio to extend the tube color. It is thick and is ideal for increasing the amount of paint when large amounts of paint are desired such as impasto techniques. The more paste added the more the transparent the paint will become and the more the color intensity will decrease. This may be particularly important with the alla prima (wet-on-wet) technique when mixing colors with a highly divergent color intensity with one another in the painting. By adding more painting paste to a stronger color this will become less prominent.