Question

What is Casein Plastic?

Answer 1

https://www.google.com/search?source=hp&q=Casein+Plastic&oq=Casein+Plastic&gs_l=psy-ab.3..0l10.4300.4300.0.14052.1.1.0.0.0.0.110.110.0j1.1.0....0...1.1.64.psy-ab..0.1.109....0.fXyMbsgXa_w