Conversation so far:
What is it called when two liquids separate
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
how does the separation of mixtures of immiscible liquids or of a liquid and a solid mixture occur
The layer closer to the top of the container—the less dense of the two liquids, or the liquid from which the precipitate or sediment has settled out—is poured off.

Question: Then what happens
Self-contained rewrite: Then what happens after the layer closer to the top of the container is poured off with decantation