Abstract: A recording material for producing offset printing plates includes: a support having a hydrophilic surface, and an infrared-imageable layer including a) a component which is capable of absorbing infrared radiation and converting the infrared radiation to heat, b) a compound which is capable of releasing acid under the action of the heat generated by component a), and c) a polymeric binder having at least one group which is cleaved by the acid released from the compound b), and at least one hydrophilic group, and wherein the layer becomes soluble in an aqueous-alkaline developer in areas struck by infrared radiation.

Abstract: A recording material for producing offset printing plates includes: a support having a hydrophilic surface, and an infrared-imageable layer including a) a component which is capable of absorbing infrared radiation and converting the infrared radiation to heat, b) a compound which is capable of releasing acid under the action of the heat generated by component a), and c) a polymeric binder having at least one group which is cleaved by the acid released from the compound b), and at least one hydrophilic group, and wherein the layer becomes soluble in an aqueous-alkaline developer in areas struck by infrared radiation.

Abstract: The invention relates to a recording material having a substrate and a radiation-sensitive, water-insoluble layer which contains a component absorbing IR radiation and which, after the action of infrared radiation, becomes soluble or at least swellable in an aqueous alkaline developer. A top layer which is opaque to white light but transparent to radiation in the IR range and can be removed with water or an aqueous solution is present on the radiation-sensitive layer. The recording material is substantially insensitive to daylight. By imagewise exposure to IR radiation and subsequent development with an aqueous alkaline developer, it is possible to produce a printing plate for offset printing from the recording material. If the top layer is washed off beforehand, the recording can also be carried out using conventional UV radiation.

Abstract: A light-sensitive material for producing color-test films for multi-color printing is disclosed. The material has (A) a transparent flexible base film of a plastic, (B) a photopolymerizable layer containing (B1) a polymeric binder, (B2) a compound polymerizable by a free-radical mechanism, (B3) a compound capable of initiating the polymerization of (B2) under the action of actinic light, and (B4) a dye or a colored pigment in one of the basic colors of multi-color printing, and (C) a thermoplastic adhesion layer on the light-sensitive layer is described. A polymer of a vinyl alkyl ether is present in at least one of the layers (B) and (C). The material is processed by lamination to an image-receiving material, with subsequent exposure and peeling-apart of base film and image-receiving material. The unexposed layer areas remain together with the adhesion layer on the image-receiving material. These steps are repeated with at least one further part-color image.

Abstract: A light-sensitive material for producing color-test films for multi-color printing is disclosed. The material has (A) a transparent flexible base film of a plastic, (B) a photopolymerizable layer containing (B1) a polymeric binder, (B2) a compound polymerizable by a free-radical mechanism, (B3) a compound capable of initiating the polymerization of (B2) under the action of actinic light, and (B4) a dye or a colored pigment in one of the basic colors of multi-color printing, and (C) a thermoplastic adhesion layer on the light-sensitive layer is described. A polymer of a vinyl alkyl ether is present in at least one of the layers (B) and (C). The material is processed by lamination to an image-receiving material, with subsequent exposure and peeling-apart of base film and image-receiving material. The unexposed layer areas remain together with the adhesion layer on the image-receiving material. These steps are repeated with at least one further part-color image.

Abstract: Described is a photosensitive material for producing metal-colored images, comprisingA) a flexible transparent plastic support film,B) a photosensitive layer comprising a polymeric binder, a photosensitive substance and a pearl luster pigment, and optionallyC) a thermoplastic adhesion-promoting layer.The material of the invention makes it possible to produce color-proofing images for metal-colored multicolor prints by combining metal-colored single-color images with single-color images in the usual primary colors as desired.

Abstract: The invention relates to a photosensitive material for the production of color proofing films for multicolor printing comprising:A) a transparent, flexible film support,B) a photopolymerizable layer containing:B1) a polymeric binder,B2) a free radical-polymerizable compound,B3) a compound which is capable of initiating the polymerization of (B2) on exposure to actinic light, andB4) a dye or colored pigment in a primary color of multicolor printing, andC) a thermoplastic adhesive layer on the photosensitive layer,which contains at least about 1.5% by weight of a water-soluble, colorless, low-molecular-weight salt whose aqueous solution is not highly acidic.The material is processed by lamination onto an image-receiving material, exposure and peeling apart of the film support and the image-receiving material, the unexposed areas of the layer and the adhesive layer remaining on the image-receiving material.

Abstract: A photosensitive material for making color-proofing films for multicolor printing is described, withA) a transparent flexible support of plastic,B) a photopolymerizable layer on (A) which containsB1) a polymeric binder,B2) a compound polymerizable by a free-radical mechanism,B3) a compound which is capable of initiating the polymerization of (B2) under the action of actinic light andB4) a dye or a color pigment in a primary color of the multicolor print, andC) a thermoplastic adhesive layer which comprises at least one polymer which contains units (C1) with aliphatic side chains having at least 5 carbon atoms.The material is processed by laminating to an image receptor sheet, exposure and peeling apart of support and image receptor sheet, the unexposed layer areas remaining together with the adhesive layer on the image receptor sheet. These steps are repeated with at least one further image in primary colors. The material provides for a reduction of the background stain in the non-image areas.

Abstract: A photosensitive material for the production of color proofing films for multicolor printing, having(A) a transparent, flexible film support of plastic,(B) a photopolymerizable layer which contains(B1) a polymeric binder,(B2) a free-radically polymerizable compound,(B3) a compound which is capable of initiating the polymerization of (B2) on exposure to actinic light, and(B4) a dye or a colored pigment in a primary color of multicolor printing, and(C) a thermoplastic adhesive layer having a layer weight of from about 2 to about 30 g/m.sup.2 on the photo-sensitive layer, wherein the thermoplastic adhesive layer contains from about 0.01 to about 0.5% by weight of a colorless pigment having a mean particle size which corresponds to from 1 to 100% of the layer thickness.

Abstract: A photosensitive material for making color-proofing films for multicolor printing is described, withA) a transparent flexible support of plastic,B) a photopolymerizable layer on (A) which containsB1) a polymeric binder,B2) a compound polymerizable by a flee-radical mechanism,B3) a compound which is capable of initiating the polymerization of (B2) under the action of actinic light andB4) a dye or a color pigment in a primary color of the multicolor print, andC) a thermoplastic adhesive layer which comprises at least one polymer which contains units (C1) with aliphatic side chains having at least 5 carbon atoms.The material is processed by laminating to an image receptor sheet, exposure and peeling apart of support and image receptor sheet, the unexposed layer areas remaining together with the adhesive layer on the image receptor sheet. These steps are repeated with at least one further image in primary colors. The material provides for a reduction of the background stain in the non-image areas.

Abstract: The invention relates to a photosensitive material for the production of color proofing films for multicolor printing comprising:A) a transparent, flexible film support,B) a photopolymerizable layer containing:B1) a polymeric binder,B2) a free radical-polymerizable compound,B3) a compound which is capable of initiating the polymerization of (B2) on exposure to actinic light, andB4) a dye or colored pigment in a primary color of multicolor printing, andC) a thermoplastic adhesive layer on the photosensitive layer,which contains at least about 1.5% by weight of a water-soluble, colorless, low-molecular-weight salt whose aqueous solution is not highly acidic.The material is processed by lamination onto an image-receiving material, exposure and peeling apart of the film support and the image-receiving material, the unexposed areas of the layer and the adhesive layer remaining on the image-receiving material.

Abstract: A light-sensitive material for producing color-test films for multi-color printing is disclosed. The material has (A) a transparent flexible base film of a plastic, (B) a photopolymerizable layer containing (B1) a polymeric binder, (B2) a compound polymerizable by a free-radical mechanism, (B3) a compound capable of initiating the polymerization of (B2) under the action of actinic light, and (B4) a dye or a colored pigment in one of the basic colors of multi-color printing, and (C) a thermoplastic adhesion layer on the light-sensitive layer is described. A polymer of a vinyl alkyl ether is present in at least one of the layers (B) and (C). The material is processed by lamination to an image-receiving material, with subsequent exposure and peeling-apart of base film and image-receiving material. The unexposed layer areas remain together with the adhesion layer on the image-receiving material. These steps are repeated with at least one further part-color image.