Yesterday, I decided to practice with casein paints on this 7" x 5" Ampersand board. Casein is an water based medium made from the protein of milk and has been around for centuries. It is best painted on a rigid surface. The paint dries very rapidly and can be applied in washes or impasto.
This unfinished practice piece helped to understand a bit better how casein works. The beautiful part of casein is, after it dries, it can be buffed with a soft cloth for a beautiful satin lustre.