Hair colour—how much do you know about it?

Colouring the hair is not as recent a trend as some of us think. It has been revealed that the practice of colouring the hair can be traced back to 1500 BC! You need to know that “hair dye” and “hair colour” are basically the same thing. It is just that your salon will call it “hair colour” to make it sound nicer.

Colouring your hair may not cause major problems, but you should take care to follow instructions and not overdo it. But first, let’s take a look at the types of hair dyes.

How many kinds are there?

Hair dyes and colours can be classified as permanent, semi-permanent, and temporary. It all depends on the amount of peroxide in the formula.

Permanent hair dye

This contains very high concentration of peroxide. It actually opens up your hair shaft and colours your hair fully. Although it is called “permanent”, it is not so. It will fade and grow out over time, but it will last you at least for eight to 10 weeks.

Semi-permanent hair dye

This kind of hair colour does not open up your hair shaft. It deposits colour into the cuticles of the hair shaft and also adds some shine to your hair. It is gentler on your hair as it contains low amounts of peroxide. But the negative is that it will last only about six weeks.

Temporary hair dye

As the name implies, it is truly temporary. It is good for those who are trying to just experiment with a new look. It is so temporary that it will last only until the next time you wash your hair.  This is because the colour just sits on the surface of your hair, outside the cuticle.

Side effects of hair colour

Hair colour contains harsh chemicals. No matter which formula of hair dye you use, it will have more than 500 different chemicals. It is evident that hair colour can have side effects.

Long-term exposure to hair dyes is likely to increase chances of cancer as they have carcinogenic properties. Moreover, some people are allergic to various chemicals of the dyes, and can get allergic reactions. Lead acetate, a compound found in some hair dyes, can cause infertility in both men and women.

If at all you do want to use hair colour, follow all the instructions carefully. And do not overdo the colouring. You do not need a new look every month!

 

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