Image-receiving material for use in diffusion transfer reversal

An image-receiving material suited for silver complex diffusion transfer (DTR) processing, wherein a polyvinyl chloride resin support is directly coated with a DTR-image receiving layer that contains developing nuclei in a binder medium, characterized in that said image-receiver layer comprises in percent by weight on its total weight the following ingredients:

• 1.3% to 80% of proteinaceous colloid,
• 0% to 85% of colloidal silica,
• 1.0% to 70% of an ionogenic polyester-polyurethane applied from an aqueous dispersion wherein isocyanate groups still present in its structure have reacted with an inomeric compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group, the number of said salt groups being sufficient to render said polyester polyurethane dispersible in an aqueous medium, and 0% to 30% of a siloxane forming a reaction product with the colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2, said siloxane being present when said silica is present in an amount substantially sufficient to form said reaction product with said silica, said polyvinyl chloride support being provided with an adhesive coating at the side thereof opposite to the DTR-image-receiving layer, the adhesive coating being protected by a strippable temporary support.

An image-receiving material suited for silver complex diffusion transfer (DTR) processing, wherein a polyvinyl chloride resin support is directly coated with a DTR-image receiving layer that contains developing nuclei in a binder medium, characterized in that said image-receiving layer comprises in percent by weight on its total weight the following ingredients:

• 1.3% to 80% of proteinaceous colloid,
• 0% to 85% of colloidal silica,
• 1.0% to 70% of an ionogenic polyester-polyurethane applied from an aqueous dispersion wherein isocyanate groups still present in its structure have reacted with an inomeric compound containing at least one active hydrogen atom and a carboxylate or sulphonate salt group, the number of said salt groups being sufficient to render said polyester polyurethane dispersible in an aqueous medium, and 0% to 30% of a siloxane forming a reaction product with the colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2, said siloxane being present when said silica is present in an amount substantially sufficient to form said reaction product with said silica, said image receiving layer containing a black-and-white photograph and being incorporated in a laminate sandwiched between a clear protective resin cover sheet and said polyvinyl chloride support.