Promois SILK-A is an esterified derivative of hydrolyzed silk protein. Thanks to its alcohol-soluble character, it can be formulated into nail-polish and hair-spray. Silk protein is formed of two proteins: fibroin and sericin. Fibroin has a unique amino acid composition. It is rich in glycine, alanine and serine which have small molecular weight and simple chemical structure. This composition is known to form a sheet structure to which is associated the comfortable touch of silk. Many of the amino acids of sericin have hydroxy groups which provides uncomparable moisturizing effect. This product is preservative free and includes upcycled silk made from waste which is generated in the processing into silk. Promois series is a range of peptides and derivatives obtained through hydrolysis of natural proteins. It is developed and manufactured in Japan by SEIWA KASEI.
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SEIWA KASEI Co., Ltd. develops chemicals from the hydrolysis of various natural materials, such as proteins. They evolved the technology by developing various chemically-modified derivatives of hydrolyzed protein(peptide). Their innovative technology for the fusion of peptide and silicone has allowed them to develop unique new hybrid polymers. Recently they develop the whole new technology, fusion of glycerin and physiological active substance, resulting in the birth of novel functional ingredients, such as arginine derivative and vitamin C derivatives. The company aims to maintain its unique identity while continuing to respond to the increasingly diverse requirements of their customers.
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