Young Red Hair Colored Girl With Blue Eyes Having A Shower And Posing In The Bathroom At Home

• Previously color treated hair can react unpredictably with subsequent color treatments.
• Previous use of shampoos which deposit a layer of plastic on the hair can block the action of the dye.
• Presence of minerals, salts, chlorine or other contaminants in the water used in the coloring process
• Certain prescription drugs can alter hair chemistry