An emulsion system contains an oily phase, an aqueous phase, and an emulsifying agent, complying with the basic requirements for the formation of a stable emulsion. For oil-in-water (o/w) emulsion systems, the following emulsifying agents are used:

1. Water-soluble soap
2. Cetyl alcohol
3. Glyceryl monostearate
4. Combination of emulsifiers, for example: triethanolamine stearate and cetyl alcohol
5. Nonionic emulsifiers, for example: glyceryl monostearate, glyceryl monooelate, propylene glycol stearate

For w/o emulsion system, the following emulsifiers are used:

1. Polyvalent ions, for example: magnesium, calcium, and aluminum
2. Combination of emulsifiers, for example: beeswax and divalent calcium ion