R&F Oil Blending Mediums are specially designed for blending, heightening transparency, and glazing R&F Pigment Sticks. Choose from mediums formulated with or without drier. Blending mediums with drier contain a small amount of cobalt drier to decrease drying time. - R & F Oil Blending Medium w/ Drier - 16 oz JarR&f Blending Medium, 16OZ BLEND M W/DRIER -