You have to wait at least 24 hours after the treatment has been applied to wash your hair. 30 minutes is how long it will take for the process to be completed. When the chemical is inside the hair shaft, it reacts with the keratin. Permanent hair colors work by penetrating into the hair shaft and changing the structure of the hair. You can wash your hair even if you have an ion permanent hair color. Many semi-permanent hair colors can be very difficult to remove. Your hair feels limp and lifeless because of the semi-permanent hair colors. The advantage of using an ion permanent hair colour is that it does not cause dry or flaky hair. The majority of semi-permanent hair colors fade in 2 – 4 weeks. Some brands claim to have products that last up to 12 weeks. Depending on the brand, semi-permanent hair colors can last anywhere from 3 to 6 weeks. The benefit of using an ion permanent hair colour is that it lasts for several months. Ion permanent hair colour only requires one application, unlike semi-permanent hair colours which require multiple applications. The benefits of using an ion permanent hair colour is that it gives excellent results. Pros & Cons To Using An Ion Permanent Hair Colour It doesn’t have to be pre-lighten the hair for the formula to lift 3-4 levels. Ion True Tones for Dark Hair is a permanent hair color that can be used to lift, color and tone hair in a single step.
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