US 4,359,517 A · Diffusion transfer products with two timing layers for production of transparencies

Abstract

Image-receiving elements and photographic diffusion transfer products providing diffusion transfer transparency images are described. The image-receiving elements include a transparent support carrying, in sequence, an acid-reacting reagent; a first polymeric timing layer possessing decreasing alkaline solution permeability with increasing temperature; a second timing layer comprising cellulose acetate; and an alkaline solution-permeable and dyeable polymeric image-receiving layer comprising a graft polymer having a polymeric backbone and grafted thereto moieties which provide mordant capability. The utilization in the image-receiving elements of the aforedescribed first and second timing layers permits the provision of elements which can be effectively processed over a range of processing temperatures and which are adapted to the provision of transparencies which exhibit desired images without the distracting or otherwise objectionable image defects associated with reticulation.

Claims43

Dependent claims

An image-receiving element for use in a diffusion transfer photographic process adapted to the provision of a transparency image comprising a transparent support carrying, in sequence, an acid-reacting reagent layer;

a first polymeric timing layer possessing decreasing alkaline solution-permeability with increasing temperature;
a second timing layer comprising cellulose acetate;
and an alkaline solution-permeable and dyeable polymeric image-receiving layer on said cellulose acetate timing layer, said image-receiving layer comprising a graft polymer having the formula ##STR19## wherein Z is an organic polymeric backbone and wherein the grafted entity, ##STR20## is the grafted residue of a graftable compound where M is a moiety which can provide a mordant capability, each R is the same or different substituent which will not hinder grafting of the mordant through the vinyl group, and n is a positive integer.

A diffusion transfer film unit for use in a diffusion transfer photographic process adapted to the provision of a transparency image comprising:

a photosensitive element comprising at least one silver halide emulsion layer having associated therewith an image dye-providing material;
an image-receiving element adapted to be separated from said photosensitive element after transfer image formation and comprising a transparent support carrying, in sequence, an acid-reacting reagent layer;
a first polymeric timing layer possessing decreasing alkaline solution-permeability with increasing temperature;
a second-timing layer comprising cellulose acetate;
and an alkaline solution-permeable and dyeable polymeric image-receiving layer on said cellulose acetate timing layer, said image-receiving layer comprising a graft polymer having the formula ##STR22## wherein Z is an organic polymeric backbone and wherein the grafted entity, ##STR23## is the grafted residue of a graftable compound where M is a moiety which can provide a mordant capability, each R is the same or different substituent which will not hinder grafting of the mordant through the vinyl group, and n is a positive integer;
and
integrated with said photosensitive and image-receiving elements, means for retaining a processing composition such that the processing composition can be distributed between the superposed elements after photoexposure of the photosensitive element.

4 more elements

A process for forming a diffusion transfer transparency which comprises the steps of:

developing an exposed photosensitive element comprising at least one silver halide emulsion layer having associated therewith an image dye-providing material, by contacting said element with a processing composition, immobilizing said dye as a result of development, forming thereby an imagewise distribution of mobile dye as a function of the point-to-point degree of exposure of said photosensitive element and transferring by imbibition at least a portion of said imagewise distribution of mobile dye to a superposed image-receiving element, said image-receiving element being adapted to separation from said photosensitive element after transfer image formation and comprising a transparent support carrying, in sequence, an acid-reacting reagent layer;
a first polymeric timing layer possessing decreasing alkaline solution-permeability with increasing temperature;
a second timing layer comprising cellulose acetate;
and an alkaline solution-permeable dyeable polymeric image-receiving layer on said cellulose acetate timing layer, said image-receiving layer comprising a graft polymer having the formula ##STR25## wherein Z is an organic polymeric backbone and wherein the grafted entity, ##STR26## is the grafted residue of a graftable compound where M is a moiety which can provide a mordant capability, each R is the same or different substituent which will not hinder grafting of the mordant through the vinyl group, and n is a positive integer.

1 more element

Dependencies are inferred from the claim text.

Diffusion transfer products with two timing layers for production of transparencies

Life of this patent

Diffusion transfer products with two timing layers for production of transparencies

Life of this patent

Abstract

Claims43