Foaming agent

A raft of similar-sized bubbles in a hexagonal grid, with an irregular arrangement of differently-sized bubbles on two sides.
Soap bubbles floating on water

A foaming agent is a material such as a surfactant or a blowing agent that facilitates the formation of foam. A surfactant, when present in small amounts, reduces surface tension of a liquid (reduces the work needed to create the foam) or increases its colloidal stability by inhibiting coalescence of bubbles. A blowing agent is a gas that forms the gaseous part of the foam.

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