Humans across the globe have an intrinsic desire to look good. The yearning comes from internal mind thrust to make individual’s persona appealing. This trait has resulted in the use of many techniques to beautify one’s face and hair. There are many techniques for enhancing the facial beauty through the use of numerous natural and synthesized substances. The practice of hair dyeing is ancient. Henna was the most common substance used for this purpose in olden days. Similarly, many procedures are developed over the years to enhance the appeal of hair. The most common application is the use of hair dyes. Spread of awareness among people has resulted in an extensive increase in usage of hair dyes.  Ever changing fashions and craving for replication of leading icons’ looks has also contributed to the practice of hair dyeing. Hair dyes are...