Monochromatic silver halide emulsion for automatic processing - contains 2-alkyl hydroquinone 5-sulphonic acid or salt for superior development, shoulder sensitivity and contrast

摘要

In a photographic emulsion, suitable for automatic processing with activator soln./stabiliser soln at least one Ag halide emulsion or coat in effective contact with this contains 30-150 g/g atom Ag in the emulsion of a hydroquinone deriv. (I) of formula: (in which R is 2-8C alkyl, pref. n- or sec-butyl or n-hexyl, M is H or an alkali metal). (I) pref. is present in each Ag halide emulsion. The emulsion(s) or coat(s) in contact with these pref. also contain 30-150 g/g atom. Ag of hydroquinone.