Roomlight handling radiographic element including an x-ray sensitive layer overcoated with a dye desensitized silver halide emulsion

Claim 1

A ROOMLIGHT HANDLING PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING COATED THEREON AT LEAST ONE XRAY-SENSITIVE GELATINO-SILVER HALIDE EMULSION LAYER CONTAINING ABOUT 3 MILLIGRAMS TO 300 MILLIGRAMS OF A NITROGEN-CONTAINING HETEROCYCLIC SILVER HALIDE DESENTIZING COMPOUND PER MOLE OF SILVER HALIDE AND A YELLOW DYE SELECTED FROM THE GROUP CONSISTING OF STYRYL-NUCLEUS CONTAINING DYES AT A CONCENTRATION OF ABOUT .5 GRAM TO 5 GRAMS PER MOLE OF SILVER HALIDE AND5-PYRAZOLONE DYES AT A CONCENTRATION OF ABOUT 10 GRAMS TO 100 GRAMS PER MOLE OF SILVER HALIDE, AND COATED ON SAID X-RAY-SENSITIVE LAYER AT LEAST ONE LIGHT-BLOCKING GELATINO-SILVER HALIDE EMULSION LAYER MORE STRONGLY DESENSITIZED THAN SAID X-RAYSENSITIVE LAYER AND CONTAINING ABOUT 20 MILLIGRAMS TO 5 GRAMS OF A NITROGEN-CONTAINING HETEROCYCLIC SILVER HALIDE DESENSITIZING COMPOUND PER MOLE OF SILVER HALIDE AND A YELLOW DYE SELECTED FROM THE GROUP CONSISTING OF STYRYLNUCLEUS CONTAINING DYES AT A CONCENTRATION OF ABOUT .5 GRAM TO 5 GRAMS PER MOLE OF SILVER HALIDE AND 5-PYRAZOLONE DYES AT A CONCENTRATION OF ABOUT 10 GRAMS TO 100 GRAMS PER MOLE OF SILVER HALIDE, SAID YELLOW DYE BEING ABSORBENT IN THE REGIONS OF THE VISIBLE SPECTRUM IN WHICH SAID GELATINO-SILVER HALIDE EMULSIONS ARE SENSITIVE AND SUITABLE TO TRANSMIT THE REST OF THE VISIBLE SPECTRUM SO THAT THE PROGRESS OF DEVELOPMENT OF SAID X-RAY-SENSITIVE LAYER CAN BE OBSERVED IN ROOMLIGHT.