HAIR COLORATION COMPOSITIONS EXHIBITING PREDETERMINED STRUCTURAL COLORATION THROUGH PHOTONIC BAND GAP EFFECTS

摘要

Hair coloration compositions for application to hair are provided. In an embodiment, a hair coloration composition includes a plurality of particles. Each particle comprises a first layer of first material and a first layer of second material with an interface therebetween. The first material has a first refractive index and the second material has a second refractive index. The difference between the first refractive index and the second refractive index is greater than zero. Each particle is configured to exhibit a photonic band gap effect at the interface when exposed to incident white light.