Abstract: A lithographic printing plate precursor is disclosed, comprising a hydrophilic support having thereon a heat-sensitive layer containing either a microcapsule containing a compound having a functional group capable of reacting by heat or a fine particulate polymer, wherein (1) when the heat-sensitive layer contains a fine particulate polymer, the fine particulate polymer may be a fine particulate polymer capable of combining or incapable of combining by heat used for the image formation and the fine particulate polymer has a functional group capable of reacting with a functional group present in another fine particulate polymer or with a functional group present in another component in the heat-sensitive layer; or (2) when the heat-sensitive layer contains a microcapsule containing a compound having a functional group capable of reacting by heat, the microcapsule may be a microcapsule having an outer wall capable of rupturing or incapable of rupturing by heat used for the image formation and a light-to-heat co

Abstract: A lithographic printing plate precursor is disclosed, which comprises an image-forming layer which contains a hydrophilic resin, an acid precursor and at least one component selected from fine particles containing a compound having a vinyloxy group and microcapsules containing a compound having a vinyloxy group, on a hydrophilic support, which can be development processed on a printing machine.

Abstract: A method for making a lithographic printing plate comprising development processing a laser beam exposed positive-working lithographic printing plate precursor comprising an aluminum support having thereon a heat-sensitive layer which contains a water-insoluble and alkali-soluble resin and an infrared absorbing agent and increases solubility in an alkaline aqueous solution upon being heated, using an automatic developing processor having a developing tank and a finishing gum-coating tank, wherein pH of a fresh solution for the finishing gum is adjusted to 4.5 or more.

Abstract: A heat-sensitive lithographic printing plate precursor which comprises a substrate having thereon an anodic oxidation layer, with the printing plate precursor comprising a hydrophilic layer containing at least one kind of fine particles selected from the group consisting of heat-fusible hydrophobic thermoplastic fine particles, finely divided polymers having thermally reactive functional groups and microcapsules in which compounds having heat-reactive functional groups are encapsulated, and with the anodic oxidation layer having a surface over which micropores having an average pore size of 6 to 40 nm are uniformly distributed.

Abstract: A lithographic printing plate precursor is disclosed, which comprises an image-forming layer which contains a hydrophilic resin, an acid precursor and at least one component selected from fine particles containing a compound having a vinyloxy group and microcapsules containing a compound having a vinyloxy group, on a hydrophilic support, which can be development processed on a printing machine.

Abstract: A lithographic printing plate precursor comprising an aluminum substrate, an image-recording layer and a hydrophilic film, the aluminum substrate being subjected to an electrochemical surface-roughening treatment in an aqueous solution comprising hydrochloric acid and provided with the hydrophilic film having a heat conductivity of 0.05 to 0.5 W/mK and/or at least one of a density of 1,000 to 3,200 kg/m3 and a porosity of 20 to 70%; and a lithographic printing plate precursor comprising an aluminum substrate, an image-recording layer and a hydrophilic film, the aluminum substrate having a surface-roughened shape comprising a small pit wherein an average opening size of the small pit is 0.01 to 3 &mgr;m and a ratio of an average depth of the small pit to the average opening size is 0.1 to 0.5, and being provided with the hydrophilic film having a heat conductivity of 0.05 to 0.5 W/mK and/or at least one of a density of 1,000 to 3,200 kg/m3 and a porosity of 20 to 70%.

Abstract: A lithographic printing plate precursor having a heat-sensitive layer on a water-receptive substrate, wherein the heat-sensitive layer comprises microcapsules containing a compound having a thermally reactive functional group, and the heat-sensitive layer or a layer adjacent to the heat-sensitive layer contains a compound capable of acting as a co-reactant in thermal reaction of the compound having a thermally reactive functional group in a state contained in other microcapsules.

Abstract: A lithographic printing plate for infrared laser is provided which shows an excellent coated surface state and an excellent stability with time against scratch, and which has a heat-sensitive layer containing the following (A) to (D):

Abstract: A heat-sensitive lithographic printing plate precursor, comprising a support having a hydrophilic surface on which (1) a thermal polymerization layer comprising an aqueous alkali-soluble polymer having addition polymerizable unsaturated bonds at its side chains and a thermal polymerization initiator and (2) a water-soluble overcoat layer comprising a water-soluble polymer and a compound capable of converting light into heat are provided in this order.

Abstract: A lithographic printing plate precursor comprising a support having a hydrophilic surface containing hydrophilic graft polymer chains and a heat-sensitive layer containing at least either of fine particulate polymer and microcapsules, which is excellent in on press developing property, sensitivity and printing durability.

Abstract: This invention provides a support for a lithographic printing plate, and an original form of a heat-sensitive lithographic printing plate, which comprises a hydrophilic film formed on a metallic base whose surface has been roughened, said hydrophilic film having a heat conductivity of 0.05-0.5 W/(m·K) in the direction of its film thickness, which when used as the development on machine type, exhibits good on-press, or good non-treatment developability, a high sensitivity, a long press life and a preferable stain resistance and ink removal property upon printing and which, when used as a conventional thermal positive or negative type, makes efficient utilization of heat for the formation of image, has a high sensitivity and exhibits a long press life and a good stain resistance in a nonimage area, wherein the non-treatment in which the development is not performed.

Abstract: A lithographic printing plate precursor comprising a hydrophilic support having thereon a heat-sensitive layer containing at least one of a thermoplastic particulate polymer having Tg of not lower than 60° C., a particulate polymer having a heat-reactive group and a microcapsule containing a compound having a heat-reactive group incorporated therein.

Abstract: A lithographic printing plate precursor comprising a support having a hydrophilic surface containing hydrophilic graft polymer chains and a heat-sensitive layer containing at least either of fine particulate polymer and microcapsules, which is excellent in on press developing property, sensitivity and printing durability.

Abstract: A lithographic printing plate precursor comprising a hydrophilic support and an image-forming layer containing a heat radical-generating agent, a polymethine dye, and at least one component selected from fine particles containing a compound having a radical polymerizable group and microcapsules encapsulating a compound having a radical polymerizable group.

Abstract: A heat-sensitive lithographic printing plate precursor which comprises a substrate having thereon an anodic oxidation layer, with the printing plate precursor comprising a hydrophilic layer containing at least one kind of fine particles selected from the group consisting of heat-fusible hydrophobic thermoplastic fine particles, finely divided polymers having thermally reactive functional groups and microcapsules in which compounds having heat-reactive functional groups are encapsulated, and with the anodic oxidation layer having a surface over which micropores having an average pore size of 6 to 40 nm are uniformly distributed.

Abstract: A lithographic printing plate precursor is disclosed, which comprises an image-forming layer which contains a hydrophilic resin, an acid precursor and at least one component selected from fine particles containing a compound having a vinyloxy group and microcapsules containing a compound having a vinyloxy group, on a hydrophilic support, which can be development processed on a printing machine.

Abstract: A lithographic printing plate precursor comprising a hydrophilic support having thereon a heat-sensitive layer containing at least one of a thermoplastic particulate polymer having Tg of not lower than 60° C., a particulate polymer having a heat-reactive group and a microcapsule containing a compound having a heat-reactive group incorporated therein.

Abstract: An object of the present invention is to provide excellent in terms of durability wherein development with water, or direct production of the plate from digital data through infrared laser recording in particular such that a special process is not necessary, is possible, by forming on a support a photosensitive layer containing a reaction product of a compound having in a molecule thereof a functional group X and a functional group Y and a compound represented by a formula (1) stated below, or alternatively, containing a polymerization product of a compound having the functional group X and a compound represented by the formula (1) stated below. Further by incorporating water-insoluble particles in this photosensitive layer, many voids are formed in the photosensitive layer, further improving sensitivity and discrimination.

Abstract: A lithographic printing plate precursor having a heat-sensitive layer on a water-receptive substrate, wherein the heat-sensitive layer comprises microcapsules containing a compound having a thermally reactive functional group, and the light-sensitive layer or a layer adjacent to the light-sensitive layer contains a compound capable of acting as a co-reactant in thermal reaction of the compound having a thermally reactive functional group in a state contained in other microcapsules.

Abstract: A lithographic printing plate precursor is disclosed, comprising a hydrophilic support having thereon a heat-sensitive layer containing either a microcapsule containing a compound having a functional group capable of reacting by heat or a fine particulate polymer, wherein (1) when the heat-sensitive layer contains a fine particulate polymer, the fine particulate polymer may be a fine particulate polymer capable of combining or incapable of combining by heat used for the image formation and the fine particulate polymer has a functional group capable of reacting with a functional group present in another fine particulate polymer or with a functional group present in another component in the heat-sensitive layer; or (2) when the heat-sensitive layer contains a microcapsule containing a compound having a functional group capable of reacting by heat, the microcapsule may be a microcapsule having an outer wall capable of rupturing or incapable of rupturing by heat used for the image formation and a light-to-heat co