On-press development type lithographic printing plate precursor and method of preparing printing plate
AssigneeFUJIFILM Corporation
InventorsShumpei WATANABE, Akira SAKAGUCHI
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Abstract
The present invention provides an on-press development type lithographic printing plate precursor including, in the following order, a support, an image-recording layer, and a protective layer, in which the image-recording layer contains a) a polymerizable compound, b) an infrared absorber, c) a polymerization initiator, and d) a color forming substance precursor, and the protective layer contains an ultraviolet absorber, and a method of preparing a printing plate.
Claims32
An on-press development type lithographic printing plate precursor comprising, in the following order:
- a support;
- an image-recording layer;
- and
- a protective layer,
- wherein the image-recording layer contains a) a polymerizable compound, b) an infrared absorber, c) a polymerization initiator, and d) a color forming substance precursor, and
- the protective layer contains an ultraviolet absorber.
An on-press development type lithographic printing plate precursor comprising, in the following order:
- a support;
- and
- an image-recording layer,
- wherein the image-recording layer contains a) a polymerizable compound, b) an infrared absorber, c) a polymerization initiator, d) a color forming substance precursor, and e) an ultraviolet absorber, and
- the polymerizable compound has 4 or more functionalities and has a molecular weight of less than 15,000.
An on-press development type lithographic printing plate precursor comprising, in the following order:
- a support;
- an image-recording layer;
- and
- a protective layer,
- wherein the image-recording layer contains a) a polymerizable compound, b) an infrared absorber, c) a polymerization initiator, and d) a color forming substance precursor,
- the protective layer contains an ultraviolet absorber,
- in a case where the image-recording layer is exposed to an infrared laser having a wavelength of 830 nm at an energy density of 120 mJ/cm2, a loss of ethylenically unsaturated bonds in an exposed region in the image-recording layer is 10% or more with respect to a loss of ethylenically unsaturated bonds in a non-exposed region in the image-recording layer, and
- in a case where the image-recording layer is exposed to a white fluorescent lamp having an illuminance of 600 Lux for 1 hour, a loss of ethylenically unsaturated bonds in an exposed region in the image-recording layer is less than 10% with respect to a loss of ethylenically unsaturated bonds in a non-exposed region in the image-recording layer.
An on-press development type lithographic printing plate precursor comprising, in the following order:
- a support;
- and
- an image-recording layer,
- wherein the image-recording layer contains a) a polymerizable compound, b) an infrared absorber, c) a polymerization initiator, d) a color forming substance precursor, and e) an ultraviolet absorber,
- in a case where the image-recording layer is exposed to an infrared laser having a wavelength of 830 nm at an energy density of 120 mJ/cm2, a loss of ethylenically unsaturated bonds in an exposed region in the image-recording layer is 10% or more with respect to a loss of ethylenically unsaturated bonds in a non-exposed region in the image-recording layer, and
- in a case where the image-recording layer is exposed to a white fluorescent lamp having an illuminance of 600 Lux for 1 hour, a loss of ethylenically unsaturated bonds in an exposed region in the image-recording layer is less than 10% with respect to a loss of ethylenically unsaturated bonds in a non-exposed region in the image-recording layer.
Dependencies are inferred from the claim text.