We first examined whether emulsifiers affected SG skin
penetration when applied in an O/W-type emulsion. O/W-type
emulsions were prepared using 6 emulsifiers that are commonly
used in cosmetics (an anionic ion surfactant SSG; nonionic
surfactants SMS, PO80, PMS, and HCO; and an amphoteric
ion surfactant HSL). The particle size of each emulsion was
approximately 200 nm, and each emulsion showed good stability