Permanent hair dye is a type of hair color that uses an ammonia-based solution to open the hair cuticle and deposit color into the cortex of the hair. The color is then “set” with a heat process. This type of hair color is also known as “oxidative hair color” because it uses oxygen to develop the color.
Permanent hair color can last anywhere from four to eight weeks, and sometimes longer, depending on the quality of the hair color and how well it is maintained.
Permanent hair dye is a great way to change your look without having to worry about your color fading. However, there are some things you should know about permanent hair dye before you use it. First, it is important to understand that permanent hair dye is not actually permanent.
It will slowly fade over time, so you will need to touch up your color every few months to keep it looking its best. Additionally, permanent hair dye can be damaging to your hair if it is not used correctly. Be sure to follow the instructions on the packaging and use a good quality hair dye to avoid damaging your hair.
How Long Does Permanent Hair Dye Last
When it comes to hair dye, there is no such thing as “permanent.” While some hair dyes claim to be permanent, they will eventually fade. The length of time a permanent hair dye will last depends on a number of factors, including the quality of the dye, how often it is exposed to sunlight, and how often it is shampooed.
In general, however, permanent hair dyes will last anywhere from four to six weeks. After that, the color will start to fade and will need to be reapplied.
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Does Permanent Hair Dye Fade Completely?
Permanent hair dye does not fade completely. It may fade somewhat over time, but the color will still be visible. The color may also change slightly due to environmental factors such as sun exposure and chlorine in swimming pools.
Is There Truly Permanent Hair Dye?
Yes, there are products on the market that claim to be permanent hair dyes. These products usually contain ammonia or peroxide, which penetrate the hair shaft and change the color of the hair. However, over time, the hair color will gradually fade back to its natural color.
Why is Permanent Hair Dye Not Permanent?
Permanent hair dyes are not actually permanent. They are called “permanent” because they use a chemical process called oxidation to permanently change the color of the hair. However, over time, the color will slowly fade back to its original shade.
The rate at which this happens depends on how often the hair is shampooed, how much sunlight it is exposed to, and the natural color of the hair.
The Science of Permanent Oxidative Hair Dye | NATURAL HAIR
Conclusion
Permanent hair dye is, well, permanent. It is the only hair color option that actually changes the hair shaft, which is why it is so difficult to remove. The dye molecules penetrate the cortex of the hair and bond with the proteins in the shaft.
This is what gives permanent hair color its staying power.