Gradual permanent coloring of hair using dye intermediates dissolved in alkaline water with a gelling agent

摘要

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.