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Defender of System Stability - Silicone Emulsifier
Silicone emulsifiers are often used in W/O emulsification systems. Generally, emulsifiers with strong emulsifying ability have relatively large molecular weight, large hydrophilic and lipophilic groups, and thick skin feeling when used. Emulsifiers with relatively small molecular weights will have weaker emulsifying power and stability, but will have a fresher skin feel, so they need to be used together in formula design.