I recently bought the amazing value KMS California Silk Sheen Duo, and have been really impressed with the results. My hair feels thicker and softer with no heavy residue. As I tend not to brush my hair, it has not left it that shiny but it still has a lustrous quality. I decided to find out a little bit more about the history of this salon brand. The first KMS California products were manufactured in 1976. Over the…