HAIR DYE COMPOSITION
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Oct 4, 2024
filing date -
Oct 4, 2024
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Abstract
A tunable hair dye composition that includes a photochromic dye, a cosmetically acceptable solvent and, optionally, a carrier. When activated with a suitable activating electromagnetic radiation, the photochromic dye molecule changes color, thereby imparting a temporary color change to the composition and hair to which it is applied. When deactivated, the photochromic dye is generally colorless. The color imparted by the photochromic dye can be tuned by adjusting the wavelength and/or fluence of the activating and/or deactivating electromagnetic radiation. Thus, a wide variety of different hair colors can be obtained from a single hair dye composition containing specific combinations of photochromic dyes.
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