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1. (WO2017040146) LITHOGRAPHIC DEVELOPER COMPOSITION AND METHOD OF USE

Pub. No.:    WO/2017/040146    International Application No.:    PCT/US2016/048382
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Aug 25 01:59:59 CEST 2016
IPC: G03F 7/32
Applicants: EASTMAN KODAK COMPANY
Inventors: HUANG, Jianbing
HAUCK, Gerhard
SAVARIAR-HAUCK, Celin
PAULS, Andrea
FRANK, Dietmar
PIESTERT, Oliver
Title: LITHOGRAPHIC DEVELOPER COMPOSITION AND METHOD OF USE
Abstract:
Lithographic printing plates are formed by imagewise exposing a single-layer or dual-layer positive-working lithographic printing plate precursor. The precursor has an outermost ink receptive layer containing a phenolic resin. The exposed precursor can be processed using a silicate-free developer composition having a pH of at least 12.5. This composition also includes an alkali metal hydroxide; a coating protecting agent that is a quaternary ammonium salt or phosphonium salt, or a mixture thereof, and a moderator for the coating protecting agent that is represented by general formula (I); wherein m is at an integer of at least 1 and up to and including 10 and M represents one or more counterions sufficient to balance the negatively-charged sulfonate groups.