Hoechst Aktiengesellschaft

Agfa-gevaert Ag

Guenter Jung

Werner Frass

Dieter Mohr

Georg Pawlowski

Willi-Kurt Gries

Gerhard Mack

Klaus-Peter Konrad

Reinhold Arneth

Birgit Mueller

Eberhard Hehl

A photosensitive mixture which contains a polycondensation product of an aromatic diazonium salt, a water-soluble amphophilic polymeric binder having a mean molecular weight M.sub.w of 5000 to 100,000 and a nonionic surface-active compound having a molecular weight of 150 to 2000 is suitable for the production of printing plates, particularly offset printing plates, which can be developed with pure water and are notable for a rapid ink take-up and long print run.

Photosensitive mixture comprising a diazonium salt, an amphophilic

The invention describes a solvent mixture for photohardenable compositions, which includes

Negative-working photosensitive coating solution containing

A light-sensitive mixture that contains a diazonium salt polycondensation product, a polymeric binder and an organic peroxide which has a scorch temperature of at least 100.degree. C. and, above this temperaure, is capable of forming free radicals is especially useful for the preparation of planographic printing plates, the print run of which can be extended by burning-in the exposed and developed plate. The light-sensitive mixture has a long storage life in the dark.

Light-sensitive diazonium resin mixture and light-sensitive diazonium

A developer for negative-working reproduction layers and process therefor. The developer includes water, an organic solvent, a surface-active agent, an alkaline agent, a complexing agent, a buffer substance, an emulsifier and an n-alkanoic compound. Use of the developer suppresses speck and fibril formation in the developing process, and can be used in reproduction layers which optionally contain a binder.

Developer for preparing printing forms and process therefor

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Taunusstein, Germany

Guenter Jung