Walnut Oil is oil extracted from Persian walnuts. Walnut oil was one of the most important and vital oils used by Renaissance painters. Its quickness of drying and lack of yellow tint make it a good oil paint thinner and brush cleaner. However, the paint film it produces is considered by some to be inferior to that of linseed oil.

Walnut Oil is oil extracted from Persian walnuts. Walnut oil was one of the most important and vital oils used by Renaissance painters. Its quickness of drying and lack of yellow tint make it a good oil paint thinner and brush cleaner. However, the paint film it produces is considered by some to be inferior to that of linseed oil.