Abstract: A light reflecting layer for a color diffusion transfer photographic system which comprises at least one compound represented by the general formula (I): ##STR1## wherein R.sub.1 represents an alkyl group having 1 to 9 carbon atoms, R.sub.2 represents an alkyl group having 1 to 5 carbon atoms, and R.sub.3 represents an alkyl group having 1 to 9 carbon atoms or a benzyl group which may be substituted at the .alpha.-position.

Abstract: A photographic support of a composite polyester film in which additives and oligomers can be incorporated in the support without exerting any undesirable effects upon photographic characteristics, which film is constructed by an inner layer of polyester containing volatile diffusible substances or exudative substances, and a covering layer of another sort of polyester, with which both sides of the inner layer are covered, not containing the above-described substances judging from practical viewpoint and that, having a glass transition point equal to or higher than that of the inner layer, and which film is orientated along at least one prescribed axis.

Abstract: A photographic element comprising a support having thereon at least one layer containing acid processed gelatin and a polymeric mordant containing a repeating unit represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents an alkyl group and the total number of carbon atoms in R.sub.1, R.sub.2 and R.sub.3 is 12 or more; and X.sup..crclbar. represents an anion.

Abstract: A photographic polyester film support dyed with a dye having a main absorption peak in the wavelength range of about 350 to about 570 nm, a dye having a main absorption peak in the wavelength range of about 640 to about 680 nm, and a dye having a main absorption peak in the wavelength range of about 420 to about 460 nm which is represented by the following formula (I) or (II): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents --H, --OH, --NH.sub.2, --NHR.sub.5, --NR.sub.5 R.sub.6, --Cl, --Br, an alkyl group having 4 or less carbon atoms or an alkoxy group having 4 or less carbon atoms; R.sub.5 and R.sub.6, which may be the same or different, each represents an alkyl group having 4 or less carbon atoms or an aryl group; X.sub.1 and X.sub.2, which may be the same or different, each represents --H, --Cl, --Br or an alkyl group having 4 or less carbon atoms; and Y represents --H, --Cl or --Br, with the proviso that R.sub.1, R.sub.2, R.sub.3 and R.sub.

Abstract: In a photographic element for the color diffusion transfer process including a neutralizing system for reducing the pH of an aqueous alkaline processing solution which comprises a neutralizing layer and a timing layer, the improvement which comprises the timing layer comprising a polymer latex which is produced by emulsion polymerization of (1) each of (A) at least one monomer selected from the group consisting of ethylene-type monomers having at least a free carboxylic acid group, a free sulfonic acid group or a free phosphoric acid group or a salt thereof and (B) at least one monomer selected from the group consisting of monomers represented by the following general formula (I) ##STR1## wherein X is a hydrogen atom, a methyl group or a --COOR.sup.1 group; Y is a hydrogen atom, a methyl group or a --(CH.sub.2).sub.n COOR.sup.2 group; Z is an aryl group, a --COOR.sup.3 group or a ##STR2## group; R.sup.1, R.sup.2 and R.sup.

Abstract: A photographic polyester film support which is dyed with (a) a dye having a main absorption peak in the wavelength range of about 530 to about 570 nm, (b) a dye having a main absorption peak in the wavelength range of about 640 to about 680 nm and (c) a dye having a main absorption peak in the wavelength range of about 420 to about 460 nm which is represented by the formula (I) below: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents --H, --OH, --NH.sub.2, --NHR.sub.7, --NR.sub.7 R.sub.8, --Cl, --Br, an alkyl group having 4 or less carbon atoms or an alkoxy group having 4 or less carbon atoms; and R.sub.7 and R.sub.8, which may be the same or different, each represents an alkyl group having 4 or less carbon atoms or an aryl group.

Abstract: Photographic method and film unit wherein a positive image is produced in a film unit by diffusion-transfer process and is viewable from the opposite side of the film unit to the side onto which image-wise light is initially directed, whereby image-reversal means in the optical system of a camera are unnecessary. After exposure, a film unit is moved into a reception means providing lightproof protection to photosensitive portions thereof and also permitting viewing of formation of a positive image therein, the film unit being removable from the reception means after effective completion of photographic processes therein.