Lithographic printing plate precursor and lithographic printing method
A lithographic printing plate precursor capable of forming an image without alkali development, comprising a hydrophilic support and a laser-sensitive photopolymerizable layer, wherein the photopolymerizable layer or other layer included in the lithographic printing plate precursor contains a copolymer containing at least a repeating unit having at least one ethylenically unsaturated bond and a repeating unit having at least two functional groups capable of interacting with a surface of the support or a copolymer containing at least a repeating unit having at least two ethylenically unsaturated bonds and a repeating unit having at least one functional group capable of interacting with a surface of the support.
1. A lithographic printing plate precursor capable of forming an image without alkali development, comprising a hydrophilic support and a laser-sensitive photopolymerizable layer, wherein the photopolymerizable layer or other layer included in the lithographic printing plate precursor contains a copolymer containing at least a repeating unit having at least one ethylenically unsaturated bond and a repeating unit having at least two functional groups capable of interacting with a surface of the support or a copolymer containing at least a repeating unit having at least two ethylenically unsaturated bonds and a repeating unit having at least one functional group capable of interacting with a surface of the support.
2. The lithographic printing plate precursor as claimed in claim 1 , wherein the copolymer further contains a repeating unit having at least one hydrophilic functional group.
3. The lithographic printing plate precursor as claimed in claim 1 , wherein the photopolymerizable layer contains an infrared absorbing agent.
4. The lithographic printing plate precursor as claimed in claim 2 , wherein the photopolymerizable layer contains an infrared absorbing agent.
5. The lithographic printing plate precursor as claimed in claim 1 , wherein the photopolymerizable layer contains a microcapsule.
6. The lithographic panting plate precursor as claimed in claim 2 , wherein the photopolymerizable layer contains a microcapsule.
7. The lithographic printing plate precursor as claimed in claim 1 , wherein the photopolymerizable layer contains a surfactant.
8. The lithographic printing plate precursor as claimed in claim 5 , wherein the microcapsule has an average particle size of from 0.01 to 3.0 μm.
9. The lithographic printing plate precursor as claimed in claim 1 , wherein the other layer is an undercoat layer provided between the support and the photopolymerizable layer and the undercoat layer contains the copolymer.
10. A lithographic printing method comprising:
loading the lithographic printing plate precursor as claimed in claim 1 on a printing machine and conducting imagewise laser exposure to the loaded lithographic printing plate precursor, or conducting imagewise laser exposure to the lithographic printing plate precursor as claimed in claim 1 and loading the exposed lithographic printing plate precursor on a printing machine; and
supplying printing ink and dampening water to the lithographic printing plate precursor to remove a laser unexposed area of the photopolymerizable layer of the lithographic printing plate precursor and conducting printing.
11. A lithographic printing plate precursor capable of forming an image without alkali development, comprising a hydrophilic support and a laser-sensitive photopolymerizable layer, wherein the photopolymerizable layer or other layer included in the lithographic printing plate precursor contains a copolymer containing at least a repeating unit having at least one ethylenically unsaturated bond, a repeating unit having at least two functional groups capable of interacting with a surface of the support, and a repeating unit having at least one hydrophilic group or a copolymer containing at least a repeating unit having at least two ethylenically unsaturated bonds, a repeating unit having at least one functional group capable of interacting with a surface of the support, and a repeating unit having at least one hydrophilic group.