Can be more damaging to your hair than semi-permanent or temporary dyes. The chemicals used are stronger. The mixture usually has to be left on for a longer period of time. Cannot be washed out if you are unhappy with the colour.
What is considered permanent hair color?
While both permanent and demi-permanent colors have the same color molecules with the same longevity and retention, the main difference is: permanent color PERMANENTLY changes your own hair. Demi-permanent, on the other hand, doesn't alter your own base color.
How long does non permanent hair colour last?
With some brands, you can expect them to last anywhere from 6 – 8 washes, but with products like L'Oréal Paris Casting Crème Gloss, you can enjoy your new colour for up to 28 shampoos. Casting Crème Gloss doesn't just last longer – it also gives you a richer tone that blends grey hairs with your natural highlights.
Is permanent color actually permanent?
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.
Does non permanent dye damage your hair?
While you won't damage your hair, the hair color may last longer or be more difficult to remove than for those with dark hair. If you use semi-permanent hair color, go easy on the shampoo but remember to condition and protect your hair against heat and other abrasive styling methods.
Should I get permanent or non permanent hair dye?
Permanent hair colour penetrates the hair cuticle, altering the structure of the hair shaft in order for the colour to be locked in permanently. Semi-permanent colour, however, is deposited on the outside of the hair shaft. Without anything locking it into place, the colour is temporary.