Gradual permanent coloring of hair using dye intermediates in a shampoo base

A method for maintaining hair color through the use of a permanent hair dye which comprises subjecting said hair to successive 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;
• and wherein part aii optionally has about 0.01 to about 10.0% of a structurant;
• part aii:
• An oxidative compound in a shampoo base at acidic pH and wherein part aii 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;
• and wherein at least one part ai and part aii optionally has about 0.01 to about 10.0% of a structurant.
• b.) rinsing said mixture from said hair with water;
• and wherein said number of treatments is at least about 2;
• and wherein said set time interval between each two consecutive treatments is between about 8 hours and 30 days.

A composition for permanently dying hair which comprises a mixture of

• part ai comprising about 0.1% to about 99.9% of a shampoo base pH and wherein part aii optionally has about 0.01 to about 5.0% of a conditioning agent;
• and part ai optionally has about 0.01 to about 5.0% of a structurant;
• a) about 0.1% to about 1% of a dye;
• and
• b) about 1% to about 4% of a volatile silicone;
• part aii comprises about 1 to about 99% of a shampoo base pH and wherein part aii optionally has about 0.01 to about 5.0% of a conditioning agent;
• and wherein part aii optionally has about 0.01 to about 10.0% of a structurant.
• a) about 1 to about 5% of an oxidative compound;
• 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;
• and at least one of part ai and part aii has about 0.01 to about 10.0% of a structurant.