Abstract: A direct reversal silver halide photographic light-sensitive material is disclosed. The material is comprised of a support having thereon a silver halide emulsion layer having silver halide grains, the surface of which is preliminarily fogged, rhodium as a desensitizer, and a dye having an absorption maximum within the range of from 470 to 520 nm. The dye is represented by the general formula (I): ##STR1## The substituents within general formula (I) are defined in the specification. The material has improved safety with respect to visible safe light and does not suffer color stain after photographic development processing. Further, the dye is stable in a solution state during processing.

Abstract: Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivative compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addenda in silver halide photographic systems.

Abstract: An optical recording member having an organic coating film comprising a compound of the general formula: ##STR1## wherein; Z.sub.1 is an atomic group necessary to form a substituted or unsubstituted nitrogen-containing heterocyclic compound ring; Z.sub.2 is an atomic group necessary to form a substituted or unsubstituted pyrane, thiapyrane, selenapyrane, benzopyrane, benzothiapyrane, benzoselenapyrane, naphthopyrane, naphathiopyrane, or naphthoselenapyrane ring; X is a sulfur, oxygen, or selenium; Z.sub.3 is a divalent hydrocarbon residue necessary to form a 5- or 6-membered ring substituted or unsubstituted; R.sub.11 is a hydrogen atom or substituted or unsubstituted alkyl; R.sub.12 and R.sub.13 each are a hydrogen atom, halogen atom, alkyl, alkoxy, aryl, substituted aryl, styryl, substituted styryl, or substituted or unsubstituted heterocyclic residue; R.sub.14 is a hydrogen or halogen atom; A.sup..crclbar. is an anion; m and n each are 0 or 1; and l is 0, 1, or 2.

Abstract: Cyanine dyes including two nitrogen containing heterocyclic nuclei, linked to each other through a rigidized conjugated 7, 9 or 11 carbon atom methine chain to form an amidinium-ion resonance system, are very good for sensitizing silver halide emulsions for use in photographic elements to be exposed to infrared radiation if one of said heterocyclic nuclei is 5-methyl-6-methoxy-benzothiazole.

Abstract: Many photographic materials must be handled under special lighting conditions in order to prevent exposure of the material. The use of large concentrations of bleachable light absorbing layers over the photosensitive emulsion tends to leave an undesirable residual stain. The inclusion of a specific class of low intensity reciprocity failure inducers to silver halide emulsions enables the emulsions and their photographic articles to be safely handled under white light conditions.

Abstract: Novel cyanine dye salts having an alkoxyaryl function joined by a vinylene linkage to a heterocyclic nucleus are useful as desensitizers in fogged, direct positive type of silver halide emulsions.

Abstract: A photographic silver halide material is provided which comprises in at least one layer a solid dispersion of at least one water-insoluble methine dye of the formula ##STR1## wherein L and L' each represent an optionally substituted methine group, n is O, 1 or 2, Z represents the atoms necessary to complete an optionally substituted acidic carbocyclic or heterocyclic ring, Y represents the atoms necessary to complete an optionally substituted basic carbocyclic or heterocyclic ring, at least one of the rings Z and Y being substituted by a --COOH group or being substituted by a group which comprises a --COOH group. The solid dispersion of the dye is finely divided in the binder material of said layer, which is normally a filter or anti-halation layer. A marked increase of sharpness of the images obtained from photographic material containing in at least one layer the solid dyestuff dispersion can be observed.

Abstract: Photo-sensitive silver halide compositions and elements are spectrally sensitized with new mathine dyes having a trialkylsilylalkyl group attached to a nitrogen atom in a heterocyclic nucleus of the dye.