Result: My hair was bright again, but the tone was not nice, and the approach was Orange, I have it, then given a pastel shade (one should not really loud description, but I still have enough hair on his head) and now they are again Mittelblond. They are quite strained, where they were previously already and I think that you get with a lot of care to go back.
Tip: The stench is terrible, we did it in the apartment and outside in the hallway you have it still smelled, so if possible you should apply the Color Remover on the terrace or on the balcony.