This alkyd medium from Talens increases the flow and/or transparency of oil colour, making the paint fatter, decreasing the drying time. 
Increases the durability and elasticity of the paint film.
Makes the brush stroke run, depending on the amount added.
Hardly influences the degree of gloss.
Slightly yellowing.
Can be thinned with white spirit or turpentine.
Suitable as glazing medium.
Flammable.
Composition: alkyd resin, white spirit.