Chelsea Classical Studio Clarified Fat Medium is an oil medium that decreases drying time and increases glossiness. A 'Fat' Medium refers to the 'Fat Over Lean' technique, which means to apply a paint layer rich in oil (fat) over a layer with less oil (lean) on a painting. This principle is fundamental to controlling the paint adhesion, drying time and glossiness of oil colours.

This is crafted from a mixture of pure, extra-pale, cold pressed linseed oil and lavender damar varnish. Even the ingredients in the mediums are handcrafted to ensure the highest quality products. This fine-art quality medium has a large oil content mixed with a varnish so is considered fairly fat, rich and glossy. There are no carcinogenic fumes since neither turpentine or petroleum is used.