Photochromic Pigment Sampler
2 gram ea. sample pack of 7 Photochromic pigments.
Comes in individually labelled ziplock baggies.
Photochromic pigments, also called solar active pigments, react under sunlight after absorbing energy from light, going from colorless to colored. The color disappears when there is no contact from sunlight.
Particle size: 5-10 um.