response: You mean hair coloring or hair dyeing? The practice of changing hair color?
original_response: Yep!  I guess it's the price we pay for changing the hair color!
history: I like to color my hair to cover gray, do you color your hair? No hair to color actually. Do you get yours done? If so, is it done at home or do you go get it done professionally by a hairdresser? I'm leaning towards going to a hairdresser, I've made quite a few mistakes doing it on my own. But I've seen so many people buy products, it must be a big business right? I can't say if it's a big business but in 2011 home coloring in the US hit $1.9 billion! I think one reason that it hit such a number is some of the products are really expensive. Brands probably charge 3x the cost to make such things! I had a friend restore their hair color too, can you tell me about that? Sure, if they tried to restore to their original hair color it may have been because their hair was discolored through a hairdressing process or perhaps it was due to sun bleaching. I see, that's really helpful to know and I'll definitely keep that in mind when I'm doing it. Is hair coloring super popular? I can't say for the world but it is popular at least in Copenhagen. 18% of the men and 75% of the women have used hair dyes according to an University of Copenhagen study! That's wild to me how so many people, at least in Copenhagen, have tried it! So many are partaking in... uh what's the phrase again?
knowledge: Hair coloring, or hair dyeing, is the practice of changing the hair color.