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Does Leaving Hair Dye In Longer Make It Darker? [Solved]

Leaving a dye on overnight will not make it darker, no matter how permanent or semi-permanent it is. This is because: The impact of box dye colour lasts only 30 to 45 minutes until it no longer works. Leaving it on any longer will merely result in a large mess!

What happens if you

Does leaving hair dye in longer make it lighter?

Conditioner

Hairdressers Guide To Coloring Your Own Hair And Not Ruining It

Hi Beautiful! Here is my professional guide to