Abstract: A dye-donor element for thermal dye transfer comprising a support having on one side thereof a dye layer and on the opposite side thereof a slipping layer comprising a lubricating material, and wherein a hydrophilic dye-barrier layer is located between the dye layer and the support, and a subbing layer is located between the dye-barrier layer and the support. The dye-barrier layer prevents wrong-way transfer of dye into the support which provides improved dye transfer densities. The subbing layer improves adhesion between the dye-barrier layer and the support.

Abstract: A dye-donor element for thermal dye transfer comprises a support, a hydrophilic dye-barrier/subbing layer comprising poly(butyl acrylate-co-2-aminoethyl methacrylate-co-2-hydroxyethyl methacrylate), poly(N-isopropylacrylamide-co-2-aminoethyl)-methacrylate-co-(2-hydroxyethy l methacrylate), poly[(2-chloroethyl)acrylamide-co-ethacrylic acid],or gelatin nitrate and a dye layer. The dye-barrier/subbing layer provides improved dye transfer densities.

Abstract: A polymer comprising polymerized N-alkyl substituted acrylamide and a polymerized crosslinking monomer wherein the polymer has a solubility parameter from about 13 to 16 at 25.degree. C., is useful as a temporary barrier layer between reactants in photographic products. The barrier layer is particularly useful as a process timing layer in color image transfer film units.

Abstract: Photographic elements, diffusion transfer assemblages and processes are described wherein a dye image-receiving layer comprising a poly(vinylimidazole) mordant is employed in a nonmordanting, water-permeable polymeric vehicle. The polymeric vehicle comprises recurring units derived from a hydroxyalkyl acrylate ester, and/or an N-hydroxyalkylacrylamide, and/or an N-alkylacrylamide. Image sharpness is thereby improved, especially under conditions of high temperature and humidity.

Abstract: Photographic assemblages, elements, receiving elements and cover sheets are described employing a novel neutralizing layer comprising a cross-linked polymer having recurring units of an N-(alkoxy-methyl)acrylamide, an acrylic acid and an alkyl acrylic ester. The need for a separate cross-linking agent is eliminated.

Abstract: Adhesive compositions are disclosed which are particularly useful as mask adhesives in instant photographic products. These adhesives provide high strength permanent bonds while greatly improving border quality around image areas after imagewise exposure and development. In addition, they can be heat sealed at relatively low sealing temperatures. These adhesive compositions comprise a polymeric acidic component having at least 3 milliequivalents of acid per gram of component, and a substantially immobile, blocked photographic development restrainer or a substantially immobile, blocked photographic developer. The polymeric acidic component comprises certain sulfo-containing polymers.

Abstract: Photographic elements, two-sheet diffusion transfer assemblages containing such elements, and dye image-receiving elements are described. The photographic element comprises a support, a neutralizing layer, a timing layer, a vinylidene chloride polymeric layer, a polymeric primer layer, and at least one silver halide emulsion layer having a dye image-providing material associated therewith. The vinylidene chloride polymeric layer and the polymeric primer layer prevent unwanted transfer of portions of the emulsion layer to a receiver when the receiver and photographic element are peeled apart. The polymeric primer layer can be either a particular ionic vinyl polymer or a particular ionic polyester.

Abstract: Two-sheet diffusion transfer assemblages and photographic elements are described which contain a primer layer located between a polymeric acid layer and a timing layer. The primer layer prevents unwanted transfer of portions of the emulsion layer to the receiver when the receiver and photographic element are peeled apart. The primer layer comprises:(a) a mixture of gelatin and cellulose nitrate, or(b) a mixture of an acrylic acid copolymer and a particular acrylic acid terpolymer, or(c) an acrylic acid copolymer as described herein.