Method for stabilizing organic base substances to light
AssigneeFuji Photo Film Co., Ltd.
InventorYoshiaki Suzuki
Life of this patent
Estimating the term…
Abstract
An organic base substance having an absorption maximum in a range of about 300 nm to about 1,500 nm is stabilized by making it coexist with a specific dithiolato metal complex. Fastness to light of dyes can be remarkably enhanced.
Claims16
A method for stabilizing an organic base substance to light which comprises causing an organic base substance having an absorption maximum in a range of about 300 nm to about 1,500 nm to coexist with at least one complex of the following general formula [I] or [II] ##STR6## wherein [Cat.sub.1 ] and [Cat.sub.2 ] independently represent a cation necessary for neutralization of the complex, M.sub.1 and M.sub.2 independently represent nickel, copper, cobalt, palladium or platinum, and n is 1 or 2.
Dependencies are inferred from the claim text.