Hair dye oxidation reveals underlying warm tones in brown hair
A hairdresser in Hoboken, New Jersey explains how artificial hair color molecules escape to reveal natural melanin after a week or two.

Oxidation changes hair appearance over time
Artificial hair color always oxidizes and almost always reveals warm tones according to a local stylist. The process occurs when heat, chemicals, or time cause the cuticle to open. This opening allows artificial color molecules to escape from the hair strand.
Natural pigment becomes visible later
The escaping molecules reveal the natural underlying melanin that was present before coloring. A person might see rich cool tones initially but notice red hues in sunlight after a short delay. This shift happens because the original blue color molecules fade while warmer pigments remain.
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