Rublev Colours Sun Thickened Walnut Oil - 8 fl oz

Walnut oil is a pale yellow drying oil derived from freshly dried walnuts (Juglans regia) grown in California. Over 99% of walnut oil sold in the United States of America is produced in California. There are also producers in France, Australia, and New Zealand. There are two types of walnut oil commercially available: cold-pressed and refined. Cold-pressed walnut oil is typically more expensive due to the loss of a higher percentage of the oil. Refined walnut oil is expeller pressed and saturated with a solvent to extract the highest percentage of oil available in the nutmeat. The solvents are subsequently eliminated by heating the mixture to around 200 °C (400 °F). Both methods produce food-grade oils. However, cold pressing preserves more of the nutrients and flavor—not important for use in paint.