k see on hairdye, if it says "not to be used on previously bleached hair."
why is this!?!
like what would happen if i did use it on previously bleached hair.
cos i plan on bleaching my hair, then dying it a colour of blonde, then adding brown highlights, but the brown and blonde both say not to be used on previously dyed hair.





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the two dyes would mix or something and react, causing your hair to go green or something.






