Can you use the same hair dye from the previous day?
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Hair dye, unmixed, has a shelf life of a year. Once you mix it with developer, you must throw away the mixture. You cannot even use it one day later.
what does unmixed mean? like mixed with peroxides or generally mixed with anything. if you mix colorant and developer is it still good after a few months or should you throw it
Why can't you use it even why can't you use it after you've mixed it with the developer what will it do to your hair
Call the company and ask them! They are the experts on their product and can give you the best info!!
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