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

• 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
• Coloring dark hair to achieve a desirable shade of blond requires bleaching, followed by a secondary color treatment. Bleached hair can still have a yellow or coppery shade. A violet-based color can cancel out yellow tones, and a blue-based shade will cancel out coppery orange.