incorporated couplers is as follows: --------------------------------------------------------------------------- Color Developing Composition I
benzyl alcohol 0-12 ml. Alkali metal hexametaphosphate 0-3 g. Alkali metal sulfite 2-20 g. Tri alkali metal phosphate .sup.. 12H.sub.2 O 10-60 g. Alkali metal bromide 0-5 g. Alkali metal iodide (0.1 % soln.) 0-15 ml. Color developing agent of Formula I 0.5-15 g. Ethylenediamine sulfate 0-20 g. Citrazinic acid 0-5 g. Dithiooctanediol 0-5 g. Water to 1 l. __________________________________________________________________________
and sufficient alkali, e.g., alkali metal hydroxide, alkali metal carbonate, etc., to adjust the pH in the range of from about 10.0 to about 14.0. The alkali metals used to advantage to make the compounds of the color developing composition are sodium, potassium, lithium, etc. Typical color developing compositions used to advantage in processes of our invention for photographic elements that do not contain couplers are as follows: --------------------------------------------------------------------------- Cyan and Yellow Color Developing Compositions
Alkali metal hexametaphosphate 0-3 g. Alkali metal sulfite 3.0-20 g. Alklai metal bromide 0.2-5 g. Tri alkali metal phosphate .sup.. 12H.sub.2 O 20.0-60 g. Alkali metal iodide (0.1% solution) 2.0-50 ml. Color developing agent of Formula I 0.5-10 g. Antifoggant (1% solution) 1.0-40 ml. Alkali metal sulfate 0-70 g. Diffusible coupler 0.5-8 g. Hexylene glycol 0-20 ml. Diethyl hydroxylamine (85%) 0.3-10 ml. Competing coupler (e.g., citrazinic acid) 0-8 g. Auxiliary developer (e.g., 1-phenyl-3-pyrazolidone) 0.1-2 g. Alkali to produce a pH in range of 10-14 Water to 1 l. __________________________________________________________________________
In this composition, a phenol or naphthol cyan-die-forming coupler is used in cyan developing compositions and an open chain acyl acetamide type yellow-dye-forming coupler is used in yellow developing compositions. Antifoggants, such as, 5-nitrobenzimidazole, 5-nitrobenzimidazole-6-nitrate, etc., are used to advantage as the antifoggant. Any of the alkalis used in photograPhic developer solutions are used to advantage in the color developing composition including alkali metal hydroxides, alkali metal carbonates, borax, etc. The alkali metals used to advantage to make the compounds of the cyan and yellow color developing compositions and the following magenta color developing composition are sodium, potassium and lithium.
MAGENTA COLOR DEVELOPING COMPOSITIONS
These are the same as the cyan and yellow developing compositions, except that they do not contain an auxiliary developing agent or any antifogging agent, but they do contain in addition to the cOmponents listed above:
Alkali metal thiocyanate 0.3- 5 g./l. Ethylenediamine 1.00- 8 ml./l. A chemical fogging agent for silver halide 0-2 g./l. __________________________________________________________________________
Chemical fogging agents used to advantage include the nucleating agents of Hanson et al., U.S. Pat. No. 3,246,987, e.g., the amine boranes (e.g., trimethylamine borane, diethylamine borane, triethylamine borane, tert-butylamine borane, pyridine borane, 2,6-lutidine borane, etc.), the polyamine boranes (.e.g, ethylenediamine diborane, hydrazine diborane, etc.), a phosphine borane (e.g., dimethylphosphine borane), an arsine borane (e.g., dimethylarsine borane), a stilbene borane (e.g., dimethylstilbene borane ), a borazine (e.g., borazine, N,N',N'-trimethyl borazine, N,N',N"-trimethoxyborazine, etc.). When no chemical fogging agent is used in the magenta color developing composition, a chemical fogging bath is advantageously used just prior to the magenta color developing composition or, alternatively, the unexposed green-sensitive silver halide emulsion layer is made developable by exposure to light. A typical chemical fogging bath has the composition:
Alkali metal hexametaphosphate 0.6 g. Alkali metal hydroxide 2.16 g. Chemical fogging agent for silver halide 0.10 g. Water to make 1 l.
Any of the chemical fogging agents listed above are uSed advantageously in this composition.