What is “Fat Over Lean?
Fat over lean is one of the most fundamental approaches to oil painting and when followed will reduce the risk of your paint cracking as it dries. An oil paint is “Fat” when it comes right from the tube. If you wanted to make it fatter, you would add more oil. To make your paint “Lean” your mixture would contain more of a thinner like turpentine. Begin your painting with a “Lean” mixture. As you add more layers, you would make the mixture fatter. This will help reduce the risk of cracking.
