Abstract: Color photographic elements, compositions, diffusion transfer film units and processes are described which employ a nondiffusible p-sulfonamidoaniline or p-sulfonamidophenol which is preferably alkali-cleavable upon oxidation to release a diffusible color-providing moiety.

Abstract: A reproduction apparatus for forming an image on a first and an opposing side of a copy sheet in a single pass including a moving photosensitive surface, a means for forming a first image on a first portion of the photosensitive surface and a second image on a second portion of the photosensitive surface, and means for transferring the first image and the second image to the first and the opposing side respectively of a copy sheet in a single pass of the copy sheet to the imaging surface. Preferably, the transferring means includes means for securing the trailing edge of the sheet to the imaging surface and means for pivoting the sheet about the surface. A process of duplex imaging in a single pass is also provided.

Abstract: Reproduction elements coated with organic photoconductors are made with improved and/or more widely selectable electrophotographic properties by employing in the photoconductive coating a donor-acceptor complex composed of a known organic electron donor having photo- or semiconductor properties, e.g. a poly-N-vinylcarbazole or polyvinylpyrene, and a N-(fluoren-9-ylidene)-aniline compound as an activating electron acceptor. Especially effective as the electron acceptor are certain new compounds, namely, p- and m-nitro-N-(2,4,7-trinitrofluoren-9-ylidene)-aniline and p-methylsulfonyl-N-(2,4,7-trinitrofluoren-9-ylidene)-aniline.

Abstract: A process for the production of a copy from an original which includes creating a charge image on a hydrophobic photoconductive material, pre-developing the charge image by the application thereto of a hydrophilic solid substance, meniscally contacting the pre-developed image with an aqueous liquid and transferring the image onto a copy receiving material. The hydrophobic photoconductive material may be a charge transfer complex of polyvinyl carbazole and trinitrofluorenone. The hydrophilic solid substance may be water-insoluble starch, silica, iron-III-oxide, zinc oxide, methylene blue, nigrosin or acid violet.

Abstract: An electrophotographic material is provided herein which comprises a conductive support layer and a photoconductive insulating layer, the latter layer comprising a photoconductive polymeric compound such as poly-N-vinylcarbazole, and a sensitizer having the following general formula ##SPC1##WhereinB represents a radical selected from the group consisting of ##SPC2## ##SPC3##Compounds falling under the latter general formula include such compounds as 2-phenyl-4-[(2'-phenyl-4'-benzopyranylidene) benzyl]-benzopyrylium perchlorate and 2,3-phenyl-4-[(2'-phenyl 4'-benzopyranylidene)benzyl]-6-methylbenzopyrylium perchlorate.