Today, I'm going to be exploring the science of azo dyes. This class of dyes is one of the most popular and it is used to dye clothing in a unique way. It is based on a reaction known as "azo coupling ...

For some people, coloring their hair is as integral to their sense of self as, say, their regular workout or slicking on a layer of lipstick. According to the experts, though, there is a specific ...