Permanent hair dye (like the name suggests) is designed to last longer than temporary and semi-permanent hair dyes, however, it still doesn't last forever. Unlike semi-permanent hair dye that's designed to last just a few shampoos, permanent hair dye penetrates the hair strands more, locking in the colour for longer.
Permanent dyes penetrate deeper into the cortex of the hair, bleach the natural coloring, and trap color particles within the hair shaft. This process can damage the hair. The difference between natural hair color and the color people want to dye their hair may also play a part in hair damage.
Ideally, *permanent hair colour* would stay vibrant forever, or at least until the roots grow. On most heads of hair, that would mean getting a good 6-8 weeks between touch-ups – but sometimes, even with permanent dye, colour fade can happen within a few weeks.
Permanent. Permanent dye is the longest lasting dye. Generally, it's safe to re-dye every 6 to 8 weeks. Permanent hair dye lightens the hair and deposits color.
For most people, this works out to be six to eight weeks.
As natural brunettes, brown hair dyes can last the longest compared to other hair dyes. There's no need to bleach your hair colour as the eumelanin content will allow the hair colour to stay on longer.
Advantages of Permanent Dyes
There is a wider range of permanent colour shades. They are often more natural-looking than temporary dyes. They provide full coverage of grey hairs. Because they do not wash out, permanent dyes encourage regular shampooing, which supports healthy hair.
Not only can hair dye potentially cause allergic reactions and hair loss (because it aids in weakening your hair shaft and, if you lighten your locks, that can result in dry brittle tresses), but it's linked to breast cancer risk—especially among Black women—too.
Common issues for hair dyes specifically included skin problems. A number of chemicals in hair dyes are known to be skin sensitizers and can cause dermatitis or rashes. Respiratory problems are also common among salon workers. “And sometimes, it turns into a longer-term condition.
Unfortunately, hair Color damages your hair. When you dye your hair it lifts the cuticle, altering the hair in a way that will never completely revert back to it's natural virgin state. However, the hair that grows from your scalp will grow out normally so only the hair that has been dyed is affected.
Since semi permanent hair color simply coats the strand of your hair, it results in lesser damage. If you are someone who colors their hair to cover their greys, this type of hair color is perfect for you. Even with regular usage, non-permanent hair color doesn't damage your hair as much as permanent hair color.
"You must understand that it will take some patience during the transition," says Kandasamy. "You will have to grow your roots at least one to two inches. That means you will have to wait anywhere from two to four months to allow your hair to grow an inch or two. (If you can, wait even longer)."
There will be no damage free way to colour your hair lighter. You will need to bleach bath your hair and then use a toner to match your natural colour. This is not something you can do at home, and you will need to visit the salon (probably more than once).
Let your bleached hair grow out for about 2 months.
If you just got your hair re-bleached, let it grow out for a couple of months so you can see your natural hair color. That way, you'll be able to match it perfectly, and your new hair color will blend seamlessly into your roots.
“Red is the hardest color to keep lustrous and the hardest color to remove,” she adds.
It's not your imagination — red hair dye does fade faster than other hair color shades.
natural red-heads have notoriously difficult hair to colour. As most red-heads know, if you try to go darker, the colour doesn't stick to the hair like it would on a blonde or brunette. If you try to go lighter, you are battling constantly with that natural red reflect.
Ideally, permanent hair colour would stay just as vibrant as it was the day you coloured it, at least until the roots grow. On most heads of hair, that would mean a good 6-8 weeks between touch-ups.
As a general rule, hair color lasts about 6-8 weeks, depending on if you're covering gray hair or not. If you don't have a lot of gray and you're dying your hair to change up your color, there are ways for stylists to blend in highlights with your natural hair color to keep it looking fresh for longer.
3: Salon color lasts longer and is healthier on your hair than box hair color.
In concurrence with both earlier studies, the results of this study indicated red hair as the least preferred hair color. In the Likert scale positive characteristic evaluation, as well as in the survey questions, brunettes were given the highest ratings of all three categories.