Patent ID: 8354216
Filing Date: 2013-01-15
Classification: B41C,G03F

Abstract:
1. A negative-working imageable element that is a negative-working lithographic printing plate precursor comprising an aluminum-containing substrate and having thereon an imageable layer comprising: a free-radically polymerizable component, an initiator composition that is capable of generating free radicals sufficient to initiate polymerization of said free-radically polymerizable component upon exposure to imaging radiation in the presence of a radiation absorbing compound, a radiation absorbing compound, optionally a polymeric binder that is not a free radically polymerizable component, an aerobic free radical inhibitor, and an anaerobic free radical inhibitor that is a C- or N-nitroso compound, N-oxide, or hydroxylamine derivative, wherein the N-oxide is selected from the group consisting of 5,5-dimethyl-1-pyrroline N-oxide, α-(4-pyridyl N-oxide)-N-t-butylnitrone, N-t-butyl-α-phenylnitrone, and 3,3,5,5-tetramethyl-1-pyrroline N-oxide, wherein the molar ratio of said anaerobic free radical inhibitor to said aerobic free radical inhibitor is at least 1:1.