| abstract |
A LIGHT-SENSITIVE COLOR-PROOFING SHEET FOR PRODUCING AN IMAGE ON VARIOUS SUBSTRATES. A LIGHT-SENSITIVE CONTINUOUS COLOR LAYER IS RELEASABLY ATTACHED TO A CARRIER. OVERLYING THE COLOR LAYER IS A WATER-INSOLUBLE TRANSPARENT COLORLESS BARRIER LAYER, TO THE OPPOSITE SURFACE OF WHICH CAN BE APPLIED A PRESSURE-SENSITIVE ADHESIVE. UPON LAMINATION OF THE SHEET TO A SUBSTRATE, AND REMOVAL OF THE CARRIER, THE COLOR LAYER IS FORMED INTO AN IMAGE, PHOTOMECHANICALLY, BY REMOVAL THEREOF IN THE NON-IMAGE AREAS. PERFERABLY THE COLOR COATING IS A PIGMENTED POLYVINYL FORMAL RESIN, THE LIGHT-SENSITIVE COMPONENT IS A DIAZO RESIN (WHICH MAY BE IN A SEPARATE COATING OR COMBINED WITH THE POLYVINYL FORMAL) AND THE BARRIER IS A POLYACRYLATE POLYMER. |