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Don't mix up the whole bottle with the developer for the test strand. Just mix a dot of each on a glass saucer and do the test. Opening the bottles does not ruin the color. If you reclose them and store in a cool dark place they'll be fine. Once the developer is mixed in with the color you have to use it right away.
Will sun in and lemon juice mess up my hair if i use a box dye to make my hair a dirty blonde or a copper blonde. And I want to keep it
by ae1234y on August 14th, 2011
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can you use a hair color stripper and then 30 volume bleach on hair that was dyed black all in one day?
by mychem97 on July 31st, 2011
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Is it okay to use the same hair dye formula that I did on a strand test 30 minutes ago?
by PurpleCap on July 17th, 2011
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For those who have used Garnier Nutrisse Ultra Color in R3?
by paolamcr7 on August 5th, 2011
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would these colors look good in black hair?
by mychem97 on July 18th, 2011
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You're reading 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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