During the grinding process, the paint is ground on the triple roller mill until it reaches an artists' quality fineness.
The range consists of 70 transparent, semi-transparent, semi-opaque and opaque colours. They all have the highest degree of lightfastness (+++) and will remain unchanged for at least 100 years under museum conditions. The range includes 32 mono-pigmented colours, including ten colours based on exclusive pigments - such as cadmiums, cobalt and chromium oxides - as well as a beautifully transparent oxide red or yellow.