four sections and work through them front to back.
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Wash hair less frequently
As we stated, the hair shaft is opened when wet. So, the best way to avoid dull hair color is to stay away from shampoo.
Instead, shampoo and towel dry hair prior to applying the color. Once applied, simply rinse out the hair dye and condition as usual.
Keep in mind that this applies to semi-permanent hair colors only.
Make it vibrant
To extend the life of your color, opt for color-safe, sulfate-free shampoos.
Also, look for shampoos for your specific color — especially if you’ve gone red. Be sure to rinse your hair with cool water.