Ntirho Wa Vapfuni
Ti humectants ntsena a ti humesi mbuyelo wo kufumela lowu heleleke. Swipfuneti swa xivumbeko lexi—swo tanihi swilo leswi tirhaka ehenhla ka misava, swilo leswi hlayisaka ni swilo leswi lulamisaka pH—swi nga antswisa kumbe ku sivela endlelo ro kufumeta. Ti surfactants tinga hunguta interfacial tension, leswi pfumelelaka humectant kuva yi hangalaka hiku ringana naswona yi humesa kuhisa hiku landzelelana.
Swikombiso swa Khwalithi eka Vaxavi
Eka vatirhi va swaku xava, ku twisisa sayense endzhaku ka mbuyelo wo kufumela swa pfuna eka ku kambela swikoxo swa swikumiwa na swivumbeko. Akuna mpimanyeto wa misava hinkwayo wa "warmth level," hikokwalaho xivumbeko lexi fanaka xinga titwa xihambanile kuya hi mahiselo ya ndzhawu na kutsakama. Ku tirha loku nga cincekiki eka swiyimo swo hambana swa vuhlayiselo na matirhiselo i xikombiso xa xiendliwa lexi endliweke kahle. Ku engetela kwalano, vukona bya ti humectants eka nhlayo leyi tirhaka (5–10% eka propylene glycol kumbe 3–8% eka glycerin) i xikombiso xa leswaku mbuyelo wo kufumela wu endliwa hi xikongomelo naswona wu tirha.

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