Abstract: Gelatin, especially in a layer of a light-sensitive silver halide photographic material, is hardened with the reaction product of a compound having at least three vinylsulfonyl groups in the molecule and a compound having at least one water-soluble group and at least one group capable of reacting with the vinylsulfonyl group, such as --SH, .dbd.NH and --NH.sub.2.

Abstract: A photographic element comprising a support and a gelatin-containing layer coated thereon which contains gelatin having been hardened with a compound having in the molecular structure an aliphatic hydrocarbon chain to which at least 3 vinyl sulfonyl groups are bonded.

Abstract: An improved method for adjusting bromide ion concentration in a photographic processing solution is disclosed in which the processing solution is contacted with particles of an insoluble bismuth compound.

Abstract: An improved silver halide photosensitive material of the lith-type is disclosed which is suitable for an infectious development in order to obtain high contrast images with high sensitivity. A method for developing the material is also disclosed. The material comprises silver halide grains containing at least 50 mole per cent of silver chloride, less than 40 mole per cent of silver bromide and less than 5 mole percent of silver iodide based on total silver halide, the average size of the grains being 0.05 to 0.5 microns in diameter. The material further comprises a compound represented by the following general formula I or II ##STR1## wherein R is alkyl, aryl, aralkyl or acyl; R' is hydrogen or --OR; and R" is hydrogen or acyl.