Integrating ultraviolet exposure detection devices

Abstract

Devices or formulations incorporating photochromic agents and methods of using them are provided. The compositions are useful in connection with personal care, light and/or ultraviolet radiation detection, imaging and printing applications.

1 . A composition for measuring cumulative light or UV exposure, said indicator comprising:
 a substrate and a photochromic agent in an amount sufficient to provide a detectable color change upon exposure to at least one of light and UV radiation.   
   
   
       2 . A method of integrating a design onto a substrate, said method comprising:
 incorporating a design into said substrate using a sufficient amount of a photochromic agent to provide a colored design upon exposure to at least one of light and UV radiation; and   exposing said substrate to at least one of light and UV radiation whereby said design is revealed.