The Cobra Study range consists of 40 strong semi-transparent, semi-opaque and opaque colours. They all have the highest degree of lightfastness (+++) and under museum conditions remain unchanged for at least 100 years. Cobra Study water mixable colours give the same fantastic results as traditional oil paints: the same brush stroke and hardly any change in colour as time goes by. And yet with Cobra Study you can paint at an affordable price. This is because we offer only the basic colours and use less pigment than in the Cobra Artist series.