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:
part ai: oxidative dye intermediates in a shampoo base at alkaline pH and
wherein part ai optionally has about 0.01 to about 5.0% of a conditioning
agent;
part aii: an oxidative compound in a shampoo base at acidic pH and wherein
part ai optionally has about 0.01 to about 5.0% of a conditioning agent;
with the proviso that at least one of part ai and part aii has about 0.01
to about 5.0% of a conditioning agent;
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.
