@Hersute: today I applied the Aufero for 20 min in clean dry hair, as you suggested me, the result is quite perfect, but I think with the Dark Ash Brown I will reach the perfection. I will order today the Dark Ash Brown, and try with this one ;-) Thx for the suggestions.

@Baldrich: thx for the exhaustive explanation of your bases ;-) In 2014 I will try with a lace base (as I said I have a stock French lace unit here at home).