A negative-working lithographic printing plate precursor includes a coating including vinylogous vitrimer particles. The vinylogous vitrimer particles include a resin having at least one moiety of formula (I), (II), and/or (III):

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Provided are a planographic printing plate precursor including a support and an image recording layer on the support, in which the image recording layer contains an organic particle containing a resin that has a constitutional unit A having a cation moiety and a constitutional unit B having an anion moiety; and a method of preparing a planographic printing plate using the planographic printing plate precursor.

Provided are a lithographic printing plate precursor including a support, and an image recording layer on the support, in which the image recording layer contains organic particles containing an addition polymerization type resin that has a constitutional unit A having a hydrogen bond-donating site, and a content of the constitutional unit A in the addition polymerization type resin is greater than 20% by mass with respect to a total mass of the addition polymerization type resin; and a method of preparing a lithographic printing plate using the lithographic printing plate precursor.

Provided are a lithographic printing plate precursor including a support, and an image recording layer on the support, in which the image recording layer contains organic particles containing an addition polymerization type resin that has a constitutional unit A having a hydrogen bond-donating site, and a content of the constitutional unit A in the addition polymerization type resin is greater than 20% by mass with respect to a total mass of the addition polymerization type resin; and a method of preparing a lithographic printing plate using the lithographic printing plate precursor.

A lithographic printing plate precursor including a photopolymerisable coating and an overcoat layer provided on top of said layer, characterized in that the overcoat layer includes a compound comprising at least one moiety having a structure according to Formula (I): (I).

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The invention relates to an imageable coating layer, thermal negative-working lithography printing plate, and platemaking method. The coating layer includes constituents in parts by weight: a radically polymerizable compound 20-60 parts, a radiation-absorbing compound 0.5-12 parts, a free radical initiator 1-25 parts, a binding agent 10-70 parts, and a development accelerator 0.5-15 parts. The platemaking method includes the steps: S1, preparing a printing plate precursor that includes a substrate having a hydrophilic surface or is provided with a hydrophilic layer and imageable coating layer covering the substrate; S2, patternedly exposing the printing plate precursor, forming an exposed area and an unexposed area; and S3, removing the unexposed area via a development process. The employment of the imageable coating layer and the plate making method allows the implementation of a flexible development process of “on-press development” or “off-press development” and produces a printing plate provided with great printing performance.

A formative surface having a conductive base covered with a dielectric and oleophobic/hydrophobic surface layer is created with defined pits to grow micro-puddles of a defined volume. The formative surface is brought into close proximity with a charge retentive surface carrying a charge image. Fountain solution vapor nucleates and grows preferentially on the base of the pits as micro-puddle droplets. The puddles are charged and extracted from the surface to provide a fog of charged droplets of narrow volume and charge distribution. The charged droplets are attracted and repelled respectively from the charged and discharged image regions of the charge retentive surface, thus developing the charged image into a fountain solution latent image. The developed latent image is then brought into contact with a transfer member blanket and split, thus creating on the blanket a fountain solution latent image ready for inking.

Ink-based digital printing systems useful for ink printing include a secondary roller having a rotatable reimageable surface layer configured to receive fountain solution. The fountain solution layer is patterned on the secondary roller and then partially transferred to an imaging blanket, where the fountain solution image is inked. The resulting ink image may be transferred to a print substrate. To achieve a very high-resolution (e.g., 1200-dpi, over 900-dpi) print with these secondary roller configurations, an equivalent very high-resolution fountain solution image needs to be transferred from the secondary roller onto the imaging blanket. To increase the resolution of the image on the secondary roller, examples include a textured surface layer added to the secondary roller for contact angle pinning the fountain solution on the roll. Approaches to introduce a micro-structure onto the surface layer of the secondary roller, and also superoleophobic surface coatings are described.

An object of the present invention is to provide a flexographic printing plate precursor in which a sensitivity of a heat-sensitive image forming layer is high and occurrence of white spots in a line drawing can be suppressed in a case of being used for a flexographic printing plate, and a manufacturing method of a flexographic printing plate using the same. The flexographic printing plate precursor of the present invention is a flexographic printing plate precursor including, in the following order, a support, a photosensitive resin layer, a barrier layer, and a heat-sensitive image forming layer, in which the barrier layer contains a first infrared absorbing dye, the heat-sensitive image forming layer contains an ultraviolet absorber and a second infrared absorbing dye, and in the barrier layer, a content of a compound having substantially no absorption in a wavelength range of 900 to 1200 nm and having an absorption in a wavelength range of 300 to 400 nm is 0% by mass or more and less than 0.1% by mass with respect to a mass of the barrier layer.

An object of the present invention is to provide a flexographic printing plate precursor in which a sensitivity of a heat-sensitive image forming layer is high and occurrence of white spots in a line drawing can be suppressed in a case of being used for a flexographic printing plate, and a manufacturing method of a flexographic printing plate using the same. The flexographic printing plate precursor of the present invention is a flexographic printing plate precursor including, in the following order, a support, a photosensitive resin layer, a barrier layer, and a heat-sensitive image forming layer, in which the barrier layer contains a first infrared absorbing dye, the heat-sensitive image forming layer contains an ultraviolet absorber and a second infrared absorbing dye, and in the barrier layer, a content of a compound having substantially no absorption in a wavelength range of 900 to 1200 nm and having an absorption in a wavelength range of 300 to 400 nm is 0% by mass or more and less than 0.1% by mass with respect to a mass of the barrier layer.