Method for making lithographic printing plates

US11633948B2 · kind B2 · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Saija Werner · Herzberg, DE
• Stefanie Hansmann · Osterode, DE
• Udo Dwars · Herzberg, DE
• Christopher D. Simpson · Osterode, DE

Key dates

• Filing date: Oct 19, 2020
• Grant date: Apr 25, 2023
• Expiry date: Jan 27, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41C2210/12
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Lithographic printing plates are provided by imagewise exposing negative-working lithographic printing plate precursors having one or more radiation-sensitive imageable layers, followed by contacting with a processing solution that contains up to 10 weight % of one or more compounds represented by Structure (I) shown as follows: R1—C(═O)—N(R2)—R3   (I) wherein R1, R2, and R3 independently represent hydrogen or a substituted or unsubstituted hydrocarbon group, or two or three of R1, R2, and R3 are combined to form one or more cyclic rings, and the total number of carbon atoms in the Structure (I) molecule is at least 7 and up to and including 33. Both negative-working and positive-working lithographic precursors can be imaged and processed using this processing solution using one or more successive applications of the same or different processing solution. The processing solution can be derived from a corresponding processing solution concentrate that can also be used for replenishment.