Definition & Meaning of "fat over lean"

What is "fat over lean"?

Fat over lean is a painting technique used to create layers of paint in a specific order. In this method, artists start with thin, lean layers of paint and gradually build up to thicker, fatter layers. The thin layers are made with less oil, while the thick layers have more oil. This approach helps prevent cracking and ensures that the paint layers properly stick to each other. The principle is based on the idea that each layer of paint should be thinner than the one put on top of it. This technique is often used in oil painting to achieve smooth, durable results and to ensure the longevity of the artwork.