Patent ID: 6506545
Filing Date: 2003-01-14
Classification: G03C,Y10S

Abstract:
A process for removing stain in a photographic material which process comprises incorporation of at least one compound of the formula (I) whereinX is O or NH; n is 1 or 2, p is 0, 1 or 2, M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R1, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed; each R2, independently, is hydrogen, C1-C8alkyl, C1-C8alkoxy, halogen, cyano, COOR, wherein R is hydrogen or C1-C3alkyl, CONHâ€”R in which R has its previous significance, SO2NHâ€”R in which R has its previous significance, NHâ€”COR in which R has its previous significance, or SO3M, wherein M has its previous significance, or, if n is 1, R2 can also be COâ€”R3 in which R3 is C1-C3alkyl or phenyl, in that photographic material.