Abstract: Imidomethyl blocked photographic image dyes and dye releasing compounds are useful in photographic elements, film units and processes. The blocked photographic dyes and dye releasing compounds have the structures: ##STR1## wherein: J represents ##STR2## X represents the atoms to complete at least one 5- or 6-membered ring; R represents hydrogen, alkyl of 1 to 4 carbon atoms or aryl of 6 to 12 carbon atoms;Q represents ##STR3## --Q--DYE represents the residue of a diffusible photographic dye; and CAR is a ballasted carrier moiety from which the dye moiety is released as a function of silver halide development.

Abstract: The present invention is directed to photosensitive elements and to diffusion transfer film units employing said elements wherein said photosensitive element includes a plurality of essential layers, including a first photosensitive silver halide layer and a second photosensitive silver halide layer, said first and second silver halide layers being sensitized to substantially the same spectral absorption range; a spacer layer intermediate and contiguous to said first and second silver halide layers, said spacer layer consisting essentially of inert particles which are substantially non-swelling in alkali, and substantially non-film forming; wherein said inert particles are equal to or less than the average diameter of the silver halide grains in said first and second silver halide layers and wherein said silver halide grains are 2.

Abstract: Photographically useful compounds such as photographic reagents and photographic dyes are blocked with a grouping which, under alkaline conditions, is cleaved from the compound by an intramolecular nucleophilic displacement reaction. The compounds are resistant to unblocking under storage conditions, but are uniformly unblocked under conditions encountered during photographic processing.

Abstract: There are described novel compounds which include a silver halide developing function, a colorless ligand which is a radical of an iminodiacetic acid and a radical containing an onium group. The compounds are useful in photography as silver halide developing agents and also may be complexed with metals to form dye developers.

Abstract: There are disclosed diffusion transfer color processes and products which employ novel image dye-providing materials which provide image dyes having the chromophoric system represented by the formula ##STR1## wherein A is ##STR2## X is H, alkyl, aryl or substituted aryl; W is H or alkyl, R is H or alkyl; m and n are each integers of from 2 to 6.The image dye-providing material includes a diffusion control moiety such as a hydroquinonyl group and may be diffusible or nondiffusible as a function of the diffusion control moiety.

Abstract: Novel xanthene dye developer compounds which include three or four silver halide developing groups are disclosed. Also described are photographic products and processes utilizing the dye developers.

Abstract: Novel xanthene dye developer compounds which include three or four silver halide developing groups are disclosed. Also described are photographic products and processes utilizing the dye developers.

Abstract: Diffusion transfer color processes and products are disclosed employing image-dye providing materials providing magenta image dyes having the chromophoric system represented by the formula ##STR1## wherein each R is the same or different and is an alkyl group, and each X is the same or different and is hydrogen or an alkyl group (including substituted alkyl). The dye image-providing material includes a diffusion control moiety, such as a hydroquinonyl group, and may be diffusible or nondiffusible as a function of the diffusion control moiety.

Abstract: A method for dispersing oil-soluble photographic additives into a hydrophilic colloid composition is disclosed characterized by the use of lecithin in conjunction with an anionic surface active agent containing an --SO.sub.3 M or --OSO.sub.3 M moiety wherein M represents a cation and a hydrophobic group having 8 to 30 carbon atoms.

Abstract: This invention is concerned with the use of certain pyridine N-oxides in diffusion transfer products and processes employing dye developers.

Abstract: A .beta.-eliminating graft copolymer useful as a diffusion control layer in film units adapted for diffusion transfer processes is disclosed.

Abstract: Hydroquinone esters are incorporated in or behind a timing layer with a high activation energy to release a competing developer upon contact with a processing composition.

Abstract: Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a releasable 6-arylazo-2-amino-3-pyridinol dye moiety or precursor thereof. The compound contains in the ortho position of the arylazo moiety a ballasted carrier moiety attached thereto either through a sulfonamido linking group or through the oxygen of a ##STR1## which said ballasted carrier moiety contains, the ballasted carrier moiety being capable of releasing the diffusible 6-arylazo-2-amino-3-pyridinol dye or precursor thereof under alkaline conditions. The dye is transferred imagewise to an image-receiving layer where it is contacted with metal ions to form a metal-complexed 6-arylazo-2-amino-3-pyridinol dye transfer image of excellent stability.