Copper: Made from real metal powder and an alkyd resin binder. Copper looks like crushed pennies. Excellent for painting frames. Can be mixed with transparent oil colors or thinned out and used for a sparkling glaze. Thin with a combination of Galkyds and OMS. Do not thin with turpentine.

Pigment: Copper powder(PM 2)
Vehicle: Oil Modified Alkyd Resin
Lightfastness I, Series 4, OPAQUE

reference:www.gamblincolors.com