R&F Pigment Sticks, 38ml, Blending Stick with Drier Handmade in the usa Pigment sticks are high quality oil paint with just enough natural wax added to maintain a solid stick form Blending sticks consist of linseed oil and a small amount of purified, natural plant and bee's waxes, and a cobalt/manganese drier Conforms to ASTM D-4236