Leonardo used thickened walnut oil for his finishing layers as this oil doesn’t yellow with time. Copal resin strengthens oil paints, increases resistance against humidity and oxidation, as well as adds durability in paint film structure. Although copal medium can be used for finishing oil painting, we don’t recommend to use it that way as restoration of your work will not be possible. Use our Copal Oil Medium as a painting medium rather as a varnish.
Ingredients: Thickened Walnut Oil, White Copal Resin, Frankincense Resin, Lavender oil, Bee Wax (<1%)
Made in BC, Canada
Free samples available upon request.