A method for permanently dyeing hair which comprises subjecting said hair
to a number of treatments, having a set time interval between each two
consecutive such treatments, wherein each treatment comprises steps a.)
and b.) below:
a.) contacting said hair, for a period of about 5 seconds to about 5
minutes with a recently made mixture of:
i) part ai dye intermediates in water at alkaline pH with quaternary
ammonium compounds;
ii) part aii an oxidizing compound such as hydrogen peroxide in water at
acidic pH;
b.) rinsing said mixture from said hair with water;
and wherein said number of treatments is between about 2 to about 30; and
wherein said set time interval between each two consecutive treatments is
between about 8 hours and 30 days.
