| abstract |
A REDUCING AGENT COMBINATION OF A POLYHYDROXYBENZENE REDUCING AGENT WITH A REDUCING AGENT WHICH IS A HYDROXYLAMINE, A REDUCTONE AND/OR A HYDRAZINE, IN A PHOTOSENSITIVE AND THERMOSENSITIVE ELEMENT, COMPOSITION AND/OR PROCESS EMPLOYING AN OXIDATION-REDUCTION IMAGE FORMING COMBINATION PROVIDES GREATER IMAGE DISCRIMINATION OR RESOLUTION, WITH AN INCREASE IN RELATIVE SPEED AND IMPROVED BLACK TONE. SUCH A REDUCING AGENT COMBINATION CAN BE EMPLOYED IN AN IMAGE REPRODUCTION SHEET IN WHICH A RADIATION SENSITIVE HEAVY METAL SALT CAN BE REDUCED TO FREE METAL AND FORM THE IMAGE COMPONENTS IN AN OXIDATION REDUCTION REACTION COMBINATION BY PRODUCING A VISIBLE COLOR CHANGE WITH AN ORGANIC SILVER SALT. |