I've been curious about the before too. I always forget to ask.
My stylist reccomends not washing hair for 24-48 hours after. The color can fade a lot faster if you do. She says conditioning is great. When she is rinsing my hair out right after, she will do a DT. I have even done an additional one when I get home because dying dries my hair out so much. I have found lightening it is far more damaging than a normal colorance or darker color.
A side note, depending on your stylist, I know they will sometimes style your hair after, but be careful of what they put in. Sometimes all this product gets layered in and all you want to do is wash it to get it out.
Hope that helps. I look forward to seeing more from others on this one. Great question.
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