Lithographic processing solutions and methods of use
OwnerCelin Savariar-Hauck, Gerhard Hauck +1inventors
InventorsCelin Savariar-Hauck, Gerhard Hauck, Moshe Nakash
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Abstract
A lithographic processing solution having a pH of less than 12 and comprising at least 0.001 and up to and including 1 weight % of a water-soluble or water-dispersible, non-IR-sensitive compound that has a heterocyclic moiety with a quaternary nitrogen in the 1-position of the heterocyclic ring, and having one or more electron donating substituents attached to the heterocyclic ring, at least one of which electron donating substituents is attached in the 2-position. The processing solution can be used to develop both single-layer and multi-layer positive-working lithographic printing plate precursors that have been imaged using infrared radiation.
Claims28
A lithographic processing solution for processing infrared radiation-sensitive, positive-working lithographic printing plate precursors, the lithographic processing solution having a pH of 12 or less and comprising at least 0.001 weight % and up to and including 1 weight % of a water-soluble or water-dispersible, non-IR-sensitive compound that has a heterocyclic moiety with a quaternary nitrogen in the 1-position of the heterocyclic ring, and having one or more electron donating substituents attached to the heterocyclic ring, at least one of which electron donating substituents is attached in the 2-position.
Dependencies are inferred from the claim text.