Casein Emulsion is the pure casein binder that is used to make casein paints. Because the emulsion is the pure binder it can be mixed with casein paints to improve the brushability or flow without altering any other characteristics. When using casein paints for very thin washes, mix one part Casein Emulsion with five parts water to ensure color brilliance and to maintain adhesion and integrity of the paint film.
Richeson Mediums are tested in accordance to: ASTM D-4236 and bear safety labels to the standards issued by ACMI. While some Richeson mediums are AP approved non-toxic, certain mediums bear the CL label with safety warnings.