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Why do instructions on henna hair dye warn against using it if you dye your hair with chemical dyes can it be harmful or just produce a funny colour?

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Henna dyes and metallic dyes are bad both ways. They can interact with other chemicals to create colors with an odd greenish/orange cast and/or damage to the point of needing to be cut off.

I do not recommend henna dyes, do some internet research...you'll probably find some of what I'm talking about.

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First answer by Txcolorist. Last edit by Txcolorist. Contributor trust: 4 [recommend contributor]. Question popularity: 2 [recommend question]

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