Method for preventing an organic colored substance from fading by light, stabilized colored compositions and photographic elements and materials

摘要

A method for preventing organic colored substance from fading by light comprising, adding to said organic colored substance a compound of the formula (I);wherein R is a substituent and n is an integer from 0 to 6, provided that when n is 2 or higher. the R's may be either the same or different from each other and they may be combined with each other to form a ring. Stabilized colored compositions and photographic elements and materials containing the compounds of formula (I).