PHOTOGRAPHISCHES ELEMENT FUER DAS FARBDIFFUSIONSUEBERTRAGUNGSVERFAHREN

摘要

In a photographic element for the color diffusion transfer process including a neutralizing system for reducing the pH of an aqueous alkaline developing solution which comprises a neutralizing layer and a timing layer wherein the timing layer is positioned on or under the neutralizing layer in direct or indirect contact therewith such that the aqueous alkaline developing solution reaches the neutralizing layer through the timing layer, the improvement which comprises said timing layer comprising a mixture of at least one polymer latex the minimum film forming temperature of which is 35 DEG C. or less (Group I) and at least one polymer latex the minimum film forming temperature of which is more than 35 DEG C. (Group II), each polymer latex being produced by emulsion polymerization of each of at least one monomer selected from the group consisting of monomers of Group (A) described below and at least one monomer selected from the group consisting of monomers of Group (B) described below, or each of at least one monomer selected from the group consisting of monomers of Group (A) described below, at least one monomer selected from the group consisting of monomers of Group (B) described below and at least one monomer selected from the group consisting of monomers of Group (C) described below: Group (A): 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, Group (B): monomers represented by the following general formula (M): (M) wherein X and Y, which may be the same or different, each represents a hydrogen atom, a methyl group, a halogen atom or a -COOR1 group; Z represents a hydrogen atom, a methyl group, a halogen atom or a -(CH2)nCOOR2 group; V represents an aryl group, a -COOR3 group or a group; R1, R2 and R3, which may be the same or different, each represents an aliphatic group or an aryl group; and n represents an integer of 0 to 3, Group (C): monofunctional or polyfunctional unsaturated monomers other than those monomers described in Group (A) and Group (B) above which are copolymerizable with the monomers described in Group (A) and Group (B) above and selected from the group consisting of acrylamides, methacrylamides, vinyl ethers, vinyl ketones, allyl compounds, vinyl heterocyclic compounds, unsaturated nitriles and polyfunctional monomers, and the polymer latex layer per se is water permeable.