Abstract: Spectral sensitizing dyes, and silver halide photographic elements incorporating them, which dyes have the formula: ##STR1## wherein: X1 and X2 each independently represent the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus (preferably benzo-condensed), and X1 may be further substituted and X2 substituted or unsubstituted;n is a positive integer from 1 to 4,p and q each independently represents 0 or 1,each L independently represents a substituted or unsubstituted methine group,R1 and R2 each independently represents substituted or unsubstituted aryl or substituted or unsubstituted alkyl,Z1 represents a substituted or unsubstituted pyrrole or furan containing group;W1 is a counterion as needed to balance the charge of the molecule.

Abstract: Silver halide photographic elements which are capable of high-contrast development and are especially useful in the field of graphic arts comprise surface latent image forming high-chloride silver halide grains and have incorporated therein a hydrazine compound which functions as a nucleator, an amino compound which functions as an incorporated booster, and a benzimidazolocarbocyanine sensitizing dye that provides enhanced photographic sensitivity yet leaves substantially no sensitizing dye stain after rapid access processing.

Abstract: Dyes of formula (I) below are described. The dyes are useful as mid-green sensitizing dyes for photographic materials ##STR1## In the above formula, R1 and R3 are methyl or ethyl, at least one of R1 and R3 being methyl. R2 and R4 are substituted or unsubstituted C.sub.1 to C.sub.6 alkyl, provided that R2 and R4 are not both methyl. X1, X2, X3, and X4 are each independently methyl, methylthio, fluoro-substituted methyl or methylthio, or hydrogen, provided that at least one of X1 and X2 and at least one of X3 and X4 are not hydrogen. Y represents an ion as needed to balance the charge of the molecule. The dyes of formula (I) sensitize silver halide to light in the mid-green region of the spectrum.

Abstract: A radiographic element is disclosed comprised of a transparent film support and spectrally sensitized tabular grain silver halide emulsion layer units coated on opposite sides of the film support. At least one of the emulsion layer units is comprised of tabular grains having a thickness of less than 0.2 micrometer accounting for greater than 50 percent of total grain projected area and exhibiting an average tabularity of greater than 25. Adsorbed to the surface of the tabular grains is at least one benzimidazolocarbocyanine dye chosen for its high level of absorption in the mid-green spectral region at the emission line of gadolinium oxysulfide, terbium activated intensifying screens and its low residual stain in the fully processed film.

Abstract: Dyes according to formulas (I), (II), (III), (IV), and (V) below are described. The dyes are useful as low-staining sensitizing dyes for photographic materials. ##STR1## Z.sub.1, Z.sub.2, Z.sub.3, R.sub.1, R.sub.2, L, D, G, X, n, P, and q are defined herein.

Abstract: Dyes are described having the formula: ##STR1## n is 0, 1, or 2, m is 0 or 1,R.sub.1 and R.sub.2 are each independently substituted or unsubstituted alkyl or aryl,R.sub.3 and R.sub.4 are each independently substituted or unsubstituted alkyl or aryl, or together with the nitrogen to which they are attached, form a substituted or unsubstituted heterocyclic ring,R.sub.5 is H, lower alkyl, or substituted or unsubstituted or aryl when n is 1, and H when n is 2,Z represents the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered heterocyclic ring,Y represents S or N-R.sub.6 wherein R.sub.6 is substituted or unsubstituted alkyl or aryl, andX is a counterion as needed to balance the charge of the molecule.the dyes are useful as sensitizing dyes for photographic materials.

Abstract: Electrically photosensitive complex cyanine colorant compounds, each comprising two merocyanine moieties joined by a cyanine moiety, are useful in electrically photosensitive materials for photoelectrophoretic (PEP) imaging processes. These compounds are symmetric or asymmetric and contain the structure: ##STR1## wherein: m and n, which are the same or different, are 0, 1 or 2;t and u, which are the same or different, are 0 or 1;p is 0, 1 or 2;R.sup.1 and R.sup.11, which are the same or different, represent an alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic group or, when taken together and p is zero, are a one- or two-carbon alkylene bridge;R.sup.2 and R.sup.22, which are the same or different, represent an alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic group;R.sup.3 and R.sup.33, which are the same or different, represent hydrogen or an alkyl group;R.sup.4 and R.sup.44, which are the same or different, represent hydrogen or an alkyl group;R.sup.4, which when taken together with R.sup.