| 摘要 |
A sheet, ribbon or web material comprising a support made of a synthetic resin or a paper support coated with a layer of said resin, wherein a resin surface of said support is coated with a subbing layer and the subbing layer itself is coated with a hydrophilic colloid image-receiving layer containing development nuclei for silver image formation by DTR-processing, characterized in that the synthetic resin of said support is a polycarbonate or polypropylene resin, and said subbing layer contains in percent by weight on its total weight following ingredients: 1.3% to 80% of proteinaceous colloid, e.g. gelatin or caseine, 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 ionomeric 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 capable of forming a reaction product with said colloidal silica, the dry coverage of the image receiving layer being in the range of 0.2 g to 16 g per m2. |
