If I open a bottle of hair dye to do a test strand and close it can use it a month later?

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  For those who have used Garnier Nutrisse Ultra Color in R3?
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  bleached my black hair and then dyed it with splat,it turned green my aunt will dye it back to black today.will it turn gray? be healthy?
  by zaniba1 on July 25th, 2011 | 1 person likes this

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