I love casein, it’s a wonderful water medium. It’s far more permanent than watercolor and gouache and it avoids the frequent plastic and/or garish look of acrylic. It’s made from milk and has existed as a painting medium for centuries. It has a ‘graphic’ look unique unto itself, flatter than oils, yet as colorful.
Chow down. Meow. https://www.dailypaintworks.com/buy/auction/1000685