Provided are a planographic printing plate precursor and a method of producing a planographic printing plate precursor, in which an image forming region during printing on newspaper page is ensured and edge stains are eliminated. Provided are a planographic printing plate precursor (10b) including an aluminum support (12) which has an anodized film (14), and an image recording layer (16) on the aluminum support (12), in which an end portion of the planographic printing plate precursor (10b) has a sagging shape having a sagging amount (X) of 25 m to 150 m and a sagging width (Y) of 70 m to 300 m, the image recording layer (16) contains an infrared absorbing agent, and a part or an entire side surface of two sides of the aluminum support (12), the two sides having the sagging shape and opposing each other contains an ink repellent agent (44); and a method of producing the planographic printing plate precursor (10b).

Provided are a lithographic printing plate precursor including an image recording layer on a support, in which a hydrophobic area is existed at at least a part of a surface of an outermost layer on a side where the image recording layer is provided and an occupation area ratio of the hydrophobic area in the surface of the outermost layer is more than 20% by area and less than 100% by area; and a method of producing a lithographic printing plate using the lithographic printing plate precursor.

Provided are a planographic printing plate precursor having an image recording layer on a support, and an overcoat layer in this order, in which the overcoat layer includes particles, the overcoat layer is an outermost layer, and an occupation area ratio of the particles in a surface of the overcoat layer is 30% by area or more; and a method of producing a planographic printing plate obtained by using the planographic printing plate precursor.

A lithographic printing plate precursor includes a photopolymerizable coating and an overcoat which is deactivated after imagewise exposure and preheating of the precursor.

A laser-engravable pad printing plate comprising at least (a) a metal support, (b) an adhesion layer, (c) a laser-engravable recording layer having a layer thickness of 20 m to 200 m, (d) a cover film,
characterized in that the laser-engravable recording layer (c) comprises (c1) 40 to 95 wt % of a polyvinyl alcohol, (c2) 5 to 50 wt % of an IR absorber, (c3) 0 to 30 wt % of an inorganic filler, (c4) 0 to 20 wt % of a crosslinker, and (c5) 0 to 10 wt % of further additives.

Embodiments of the present invention involve three-layer printing members having a central layer that is non-conductive yet abalatable at commercially realistic fluence levels. In various embodiments, the central layer is polymeric with a dispersion of nonconductive carbon black particles therein at a loading level sufficient to provide at least partial layer ablatability and water compatibility of the resulting ablation debris.

Provided are a lithographic printing plate precursor including a hydrophilized aluminum support, and a water-soluble or water-dispersible negative type image recording layer provided on the aluminum support, in which an arithmetic average height Sa of a surface of an outermost layer on a side where the image recording layer is provided is in a range of 0.3 m to 20 m or in which Expression (1) and Expression (2) are satisfied in a case where a Bekk smoothness of a surface of an outermost layer on a side where the image recording layer is provided is set as a seconds and a Bekk smoothness of a surface of an outermost layer on a side opposite to a side where the image recording layer is provided is set as b seconds; a method of producing the same; a lithographic printing plate precursor laminate formed of the lithographic printing plate precursor; a plate-making method for a lithographic printing plate; and a lithographic printing method.

a1000, b1000(1)

1/a+1/b0.002(2)

Provided are a lithographic printing plate precursor having a support, an image recording layer, and an overcoat layer in this order, in which the overcoat layer includes a water-soluble polymer and particles, a melting point of the particles is in a range of 70 C. to 150 C., and a volume average particle diameter of the particles is greater than 0.7 m and a method of producing a lithographic printing plate obtained by using the lithographic printing plate precursor.

Provided are a printing plate precursor including a support, a layer containing a polymer on a printing surface side on the support, and a layer containing tabular particles on a non-printing surface side opposite to the layer containing a polymer in a state of sandwiching the support therebetween, and a printing plate precursor laminate which is obtained by laminating a plurality of the printing plate precursors, wherein the printing plate precursor laminate is formed such that an outermost layer on a surface where the layer containing the polymer is provided and an outermost layer on a surface where the layer containing the tabular particles is provided are laminated by being brought into direct contact with each other.

Provided are a lithographic printing plate precursor including an image recording layer on a support, in which the lithographic printing plate precursor has projections which are discontinuously formed on a surface of an outermost layer on a side where the image recording layer is provided, and a melting point of each projection is in a range of 70 C. to 150 C.; and a method of producing a lithographic printing plate obtained by using the lithographic printing plate precursor.

It is preferable that the method of producing a lithographic printing plate includes a step of image-wise exposing the lithographic printing plate precursor to form an exposed portion and an unexposed portion, and a step of supplying at least one of printing ink or dampening water to remove the unexposed portion.