R & F - Pigment Sticks - 38 ml - Burnt Sienna - R and F 38 ml. Pigment Sticks are oil paint in a stick form. Pigment Sticks are composed of linseed oil, natural beeswax, and pigment. Due to their unique formula, R and F Pigment Sticks are buttery smooth and quite fluid. They dry to a tough, flexible oil paint film. They are sometimes referred to with the more generic term Oil Sticks or Oil Bar.
The difference between oil sticks and oil pastels is the type of oil that each is composed of. R and F Pigment Sticks are composed of a drying oil (linseed oil). Works done in oil stick do not need to be placed under glass for presentation, as the surface is a dry, tough, flexible paint film. Unlike pastels which are normally made with a non drying mineral oil.