Formation of an opaque off colored layer at the top of a liquid emulsion.
The separation of a layer of the dispersed phase of an emulsion polish to the surface of the liquid continuous phase. This can be seen as a ring on the inside surface of a container on top of a liquid emulsion.
Coating defect: separation of emulsions. Particles of the disperse phase concentrate in the upper layer, forming a cream-like highly concentrated emulsion.