Comments about Pelikan Plaka Paint:

Plaka Casein is DIFFERENT than the other available casein paint. Its benefits, in my opinion, are that it's WATERPROOF and SLIGHTLY RUNNY. It is like a thick liquid in the jar, though you still have to stir or shake it and add a little water before use. It really is quite waterproof when dry, even if you let it dry on the palette for just a few minutes and then try to re-wet it, it remains. It is like a smooth fine gouache paint, only more opaque. I use it on illustration board and its appearance is wonderfully flat and smooth. Works with single-action airbrush when thinned. BEWARE: it does have a slight fume smell. I would best describe it as a "permanent marker" / xylene smell; I almost wonder if they put xylene in the paint. I've grown fond of the smell over the years, but I was surprised when I first tried these paints.

They are prone to dry or solidify in the jar after a few years, especially the lighter colours for some reason, so if you don't use them for 5-8 months, be sure to add a few drops of water to the jar to help keep them moist, and ALWAYS PUT CAPS ON TIGHTLY. They should be stirred with a small screwdriver or thin palette knife to really get them mixed properly.