It has been reported 3-5 that in a single permanent waving treatment, approximately 50% of the 18-MEA content is lost in a bleaching treatment, almost all of it is lost. Chemical treatments such as bleaching or perming may remove this component of the F-layer. 2 This hydrophilization of the hair surface is due to a loss of the F-Layer, which mainly comprises the fatty acid 18-methyleicosanoic acid (18-MEA). 1 This leads to roughness and a feeling of “drag” and stiffness during combing, along with tangling. When hair becomes damaged, its fiber surfaces become hydrophilic. With advancing silicone technology, these ingredients came into broader use for hair cuticle protection and conditioning, similar to earlier-used mineral and vegetable oils or fatty acid esters. Shampoos were first formulated with silicones more than 30 years ago. An extensive history of testing and safe use.Emulsion options for ease of formulation and.A broad range of colorless, transparent and odorless forms.

Hair shine, smoothness and improved combing.

Ease of spreading, with a smooth, silky and lasting afterfeel on skin and hair.

Silicones offer several useful characteristics for both consumers and formulators, including: The resulting materials include volatile fluids, gums, waxes and elastomers, and they can be oil or water soluble. For example, modifications can be made by altering their molecular weight or by adding organic functionalities, such as polyether, alkyl and amine. They can form structures with almost endless variations and a range of useful properties. These versatile polymers, which comprise silicon and oxygen atoms, represent a broad chemical family. Silicones have a long history of use in beauty and personal care products, extending back to the early 1950s. *Republished with permission from the Journal of Japan Hair Science Association (in Japanese)

Sims 4 softness skin