casein paint(n = noun.artifact) casein - a water-base paint made with a protein precipitated from milk;
is a kind of water-base paint

acrylic paint, casein, casein glue, coat of paint, finger paint, house paint, indian paint, latex paint, oil paint, paint, paint a picture, paint leaf, paint roller, paint the lily, paint the town red, poster paint, rubber-base paint, spray paint, touch up paint, war paint, water-base paint