METHOD OF DIFFUSING AND TRANSFERRING DYE IN PHOTOGRAPHIC SCIENCE AND PHOTOGRAPHIC MATERIALS USED THEREFOR

摘要

Non-diffusible dye-providing compounds for the dye diffusion transfer process yielding yellow to red color images of wanted absorption characteristics and improved light fastness correspond to the formula ##EQU1## IN WHICH A.sup.1 represents an oxidizable organic carrier residue which may be attached through a connecting member X and containing a group which confers diffusion resistance, from which carrier residue, either in its oxidized or in its unoxidized form, a part is split off together with the group which confers diffusion resistance under alkaline photographic development conditions, a diffusible azo dye represented by the formula P--N═N--B being released imagewise at the same time;PPD represents a heterocyclic or carbocyclic aromatic group;PPPy represents a pyridine or 1,2- dihydropyridine group which is attached to the azo group through its 3- position and carries an amino or hydroxyl group in its 6-position; P PN = 0 OR 1.