Hair dyeing is the process of adding or removing color from hair. It can be done for a variety of reasons, including to change one's appearance, to cover gray hair, or to correct a previous coloring mistake. There are many different hair dyeing methods, and the best method for a particular person will depend on their hair type, the desired color, and the amount of time and effort they are willing to put into the process.
Hair dyeing has been practiced for centuries, and there are records of people using henna to dye their hair as far back as ancient Egypt. Today, there are many different types of hair dye available, including permanent, semi-permanent, and temporary dyes. Permanent dyes are the most long-lasting, but they can also be the most damaging to hair. Semi-permanent dyes last for a few weeks, and they are less damaging than permanent dyes. Temporary dyes wash out after one shampoo, and they are the least damaging to hair.