Abstract: A lithographic printing form comprising an ink where said ink comprises a polymer or copolymer having acidic groups where at least one of said groups has been converted to an amide. A method of producing a lithographic printing form comprising the steps of printing upon a substrate with an ink comprising the previously mentioned polymer and drying the substrate. An ink and a process for producing inks comprising a polymer or copolymer with acidic groups, where at least one of said groups has been converted to the corresponding amide; optionally the ink further comprises fatty acids, metals, metal complexes and/or dyes.