Does “Silver/Purple” Shampoo Really Cancel Brassy Colors?

Makeup At Midnight says…Ever since I’ve been dying my hair blonde, I’ve been told by many people to treat my hair with a “purple/silver” toning shampoo or conditioner every few days to help prevent my hair from getting a brassy tone to it. Supposedly, this works by ‘color theory’ in the way that the purple toner in the shampoo is able to cancel out the brassy yellow colors in the hair. An example of such a product is the AG Sterling Silver line, one that I’ve been using myself (although I’m still skeptical). My question is, does these types of products actually work to keep brassy colored hair at bay? The Beauty Brains respond: There is a good bit of science at work here but don’t get your hopes up too high. Here’s why: The cause of yellow hair Back in the late ’60s or early ’70s companies recognized the need for shampoos focussed on the problems of people with gray or silver hair. Specifically consumers complained about their silver hair developed a yellowish cast.  The yellowing effect could come from protein degradation, lipid oxidation or perhaps even residue from other haircare products. And it makes senses that it would be apparent on silver hair subtle shifts in color are more  visible on such a light background (hair that doesn’t have any dark pigment). Regardless of the cause, women (and men) wanted some way to stop their silver mane from looking like it had been peed upon. (We exa...
Source: thebeautybrains.com - Category: Consumer Health News Authors: Tags: Questions Source Type: blogs