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. The properties 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.