Water-fast two-component diazotype paper

Claim 1

TWO-COMPUNENT DIAZOTYPE PAPER COMPRISING A PAPER SUPORT SENSITIZED THEREOVER WITH A LIGHT-SENSITIVE COMPOSITION COMPRISING A LIGHT-SENSITIVE DIAZO COMPOUND AND AN AZO COUPLING COMPONENT WHICH COUPLES WITH SAID COMPOUND MORE ACTIVELY THAN DOES ANY OF 2-HYDROXYMETHYL 1'',2'',4,5-NAPHTHIMIDAZOLE, 2-HYDROXYETHYL 1'',2'',4,5-NAPHTHIMIDAZOLE AND 1'',2'',4-5-NAPHTHIMIDAZOLES HAVING A HYDROXYL GROUP IN ONE OF THE 5'', 6'', AND 7'' POSITIONS ON THE NAPHTHALENE NUCLEUS AND WHICH UPON COUPLING WITH SAID COMPOUND FORMS THEREWITH A WATER SOLUBLE AZO DYESTUFF THAT TENDS TO BLEED WHEN WETTED BY WATER, SAID SUPPORT CARRYING THEREOVER IN INITIMATE CONTACT WITH SAID DIAZO COMPOUND AND SAID AZO COUPLING COMPONENT AN AGENT TO ENHANCE THE WATER-FASTNESS OF SAID DYESTUFF, SELECTED FROM THE GROUP CONSISTING OF 2-HYDROXYMETHYL 1'',2'',4,5-NAPHTHIMIDAZOLE, 2-HYDROXYETHYL 1'',2'',4,5-NAPHTHIMIDAZOLE, 1'',2'',4,5-NAPHTHIMISDAZOLES HAVING IN THE 2-POSITION ON THE IMIDAZOLE NUCLEUS A CONSTITUENT SELECTED FROM THE CLASS CONSISTING OF A HYDROGEN ATOM AND METHYL, HYDROXY-METHYL AND HYROXY-ETHYL GROUPS AND HAVING A HYDROXYL GROUP IN ONE OF THE 5'', 6'' AND 7'' POSITIONS ON THE NAPHTHALENE NUCLEUS, MIXTURES OF SAID NAPHTHIMIDAZOLES, AND WATER SOLUBLE ACID SALTS THEREOF, SAID AZO COUPLING COMPONENT HAVING A COUPLING ACTIVITY, AND BEING PRESENT IN A CONCENTRATION EXCEEDING THAT WHICH IS STOICHIOMETRIC TO THE QUANTITY OF SAID DIAZO COMPOUND PRESENT, SUFFICIENT THAT UPON DEVELOPMENT OF SAID PAPER SAID COMPONENT WILL COUPLE WITH SUBSTANTALLY ALLA THE DIZAO COMPOUND THEREIN TO THE EXCLSUION OF ANY SUBSTANTIAL COUPLING OF SAID AGENT THEREWITH, SAID GENT BEING PRESENT IN A QUNATITY TO RENDER SUBSTNATIALLY NON-BLEEDING, WHEN WETTED BY WATER, AN IMAGE OF SAID DEYSTUFF FORMED ON SAID SUPPORT BY IMAGEWISE EXPOSURE AND DEVELOPMENT OF SAID PAPER.