Creamer in Casein

I threw a couple tubes of casein—black and white—into my kit this morning on the way to the diner.

While waiting for my scrambled eggs, I did this little study of the creamer. Casein is well suited to this kind of rendering because you can match tones and textures very closely. 

It's also fitting because I was painting the milk container using paint that uses milk as the binder.
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For Anton on FB, here's more about the tools I was using:
I was using Richeson / Shiva casein
1/4 inch flat brush 
Moleskine watercolor notebook
Waterman Phileas red fountain pen 
Lots of info on casein at Richeson's FAQ about casein