34 6 g colloidal silica aqueous dis persion 30 sio sub 2 77 6 g n 2 hydroxyethyl n n 39 n 39 tris carboxymethyl ethylene diamine 36 4 g polyethylene glycol molecularweight 6 000 22 7 g 4 amino pyrazolo pyrimidine 11 3 g 2 benzimidazoyl methyl sulfidebydrate 0 95 g str21 93 4 g str22 20 8 g __________________________________________________________________________ the photosensitive element of such prepared integral film units may be exposed through the transparent support of the image receiving element and a layer of the processing composition may be distributed by passing the film unit between a pair of pressure applying rolls this example presents a comparison of dye stability measurements for two film units one containing a 1 1 chrome complexed yellow dye developer of the prior art formula 7 and the other containing a 2 1 chrome complexed yellow dye developer of this invention fig4 graphically depiects the dye stability measurements the two film units had multicolor photosensitive elements prepared as described before and were substantially the same except for the yellow dye developer layers in the film unit designated as 2069 150 of fig4 the yellow dye containing layer contained the 2 1 chrome complexed yellow dye developer of example 5 and 2 phenyl benzimidazole dispersed in gelatin at a coverage of about 8 7 mgs ft 2 yellow dye developer about 20 mgs ft 2 of 2 phenyl benzimidizole and about 18 mgs ft 2 of gelatin in the film unit designated as 2069 130.