The Universal Selection Source: Cosmetics Ingredients


Solvent Composition for One-step Permanent Wave & Hair Straightener

SpecialChem / Nov 21, 2012

Generally, the principle behind permanent wave and hair straightening is closely related to the structure and properties of hair. Hair has a three-layer structure including an epidermis layer as the outermost layer, a cortex layer as the middle layer and a medulla layer as the innermost layer. The cortex layer, which is a main component of hair, is made of highly-elastic fibrous scleroprotein, cal

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