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: dye intermediates in water with a gelling agent at alkaline pH 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.
一种永久性染发的方法,包括对所述头发进行多次处理,每两次连续处理之间有一 个设定的时间间隔,其中每次处理包括以下步骤 a)和 b):
a.) 在约 5 秒至约 5 分钟的时间内,用最近制成的混合物接触所述头发:
ai 部分:
染料中间体在
水中与胶凝剂(pH 值为碱性) aii 部分:氧化化合物(如
过氧化氢)在
水中(pH 值为酸性);
b.) 用清
水冲洗头发上的混合物;
其中,所述处理次数介于约 2 次至约 30 次之间;每两次连续处理之间的设定时间间隔介于约 8 小时至 30 天之间。