Khadi Schwarz black fading faster then it should
I dyed my hair with khadi Schwartz black 2 weeks ago (it's a mix of henna and indigo as far as I know). My hair had a good somewhat warm black color. Since dyeing, my hair has turned from black to My original hair color (dark brown) with burgundy showing when artificial light hits it. My mom has been using henna for years now, and she said that I don't need any special shampoo for it. The thing is, she uses normal shampoo while I have to use anti-dandruff shampoo (this runs in the male part of my family, all of them said that they had to use anti-dandruff shampoo between the ages of 13-20). As far as I know, anti-dandruff shampoo is much stronger than a normal shampoo. Could it be that it washed out the color from my hair? I wash it 2x a week. And if so, should I re-dye my hair and change to a normal shampoo and only use anti-dandruff when my shoulders look like a snowy mountain?