PHOTOCHROMIC TOY

摘要

The present invention relates to a photochromic toy which is composed of: a light irradiation unit that is provided with a light source; and a toy main body that contains a photochromic compound. The light source has a peak wavelength within the range from 400 nm to 495 nm. The photochromic compound has a characteristic such that the integrated value (x) of absorbance within a wavelength range from a wavelength less than 400 nm, at said wavelength the absorbance being maximum, to 400 nm and the integrated value (y) of absorbance within a wavelength range from 400 nm to 700 nm satisfy the following formula (1). y/x = 0.02 (1)