Reproduction layers for planographic and offset printing plates
First Claim
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1. A PRESENSITIZED PRINTING PLATE COMPRISING A BASE MATERIAL HAVING A COATING THEREON, THE COATING COMPRISING A DIAZO COMPOUND PREPARED BY THE REACTON OF FORMALDEHYDE WITH A DIAZONIUM SALT OF A P-AMINODIPHENYLAMINE IN HIGH CONCENTRATION PHOSPHORIC ACID.
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6 Claims
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1. A PRESENSITIZED PRINTING PLATE COMPRISING A BASE MATERIAL HAVING A COATING THEREON, THE COATING COMPRISING A DIAZO COMPOUND PREPARED BY THE REACTON OF FORMALDEHYDE WITH A DIAZONIUM SALT OF A P-AMINODIPHENYLAMINE IN HIGH CONCENTRATION PHOSPHORIC ACID.
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6. A PROCESS FOR MAKING A PRINTING PLATE WHICH COMPRISES EXPOSING A COATED BASE MATERIAL TO LIGHT UNDER A MASTER, THE COATING COMPRISING A DIAZO COMPOUND PREPARED BY THE REACTION OF FORMALDEHYDE WITH A DIAZONIUM SALT OF A P-AMINODIPHENYLAMINE IN HIGH CONCENTRATION PHOSPHORIC ACID AND TREATING THE EXPOSED COATING WITH A DEVELOPING SOLUTION.
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Current AssigneeAugust Rebenstock, Wilhelm Neugebauer
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Original AssigneeAugust Rebenstock, Wilhelm Neugebauer
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InventorsWILHELM NEUGEBAUER, AUGUST REBENSTOCK
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Application NumberUS04/150,211Time in Patent Office1,562 DaysField of SearchUS Class Current430/175CPC Class CodesG03F 7/021 Macromolecular diazonium co...
