No, box dyes are not truly permanent in the sense that the hair returns to its original, untreated state. While the color may fade over time, the underlying chemical alterations to the hair structure remain.
Here's a breakdown:
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The Permanence Illusion: Box dyes marketed as "permanent" penetrate the hair shaft and deposit color that is resistant to washing out immediately. This creates the illusion of permanence.
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Chemical Changes: These dyes contain chemicals like ammonia and peroxide, which lift the hair's cuticle (the outer layer) and deposit color. This process permanently alters the hair's structure, even after the dye fades.
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Color Fading: While the initial color may last several weeks, it will gradually fade due to washing, sun exposure, and other factors. The rate of fading depends on the dye, hair type, and aftercare routine.
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Underlying Alterations Remain: Even after the color fades, the hair's structure has been permanently changed. This is why it may be difficult to return to your natural hair color without professional intervention. Bleach and other harsh chemicals in box dyes permanently change the hair’s natural pigments until the hair grows out.
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Professional Colour Remover: As stated in the reference material, professional colour remover can assist in stripping box dye from the hair, allowing a professional to asses the state of the hair. However, colour remover cannot reverse the damage done to the hair's underlying structure.
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Growing Out: The only way to fully remove the effects of permanent box dye is to grow out the treated hair and cut it off.
In essence, while the color eventually fades, the chemical alteration to the hair shaft is permanent until the hair is replaced with new growth. Therefore, considering the lasting impact is crucial before using box dyes.
