A soaking process of the present invention may be performed at conventional soaking conditions, i.e. the pH of soak float in the range pH 4 to 12, preferably the range pH 6 to10, most preferably the range pH 7 to 9; a temperature in the range of 5 ??C to 32 ??C, preferably the range of 15 ??C to 30 ??C, more preferably in the range of 20 ??C to 30 ??C, and potentially together with known tensides