Kimoto Co, Ltd.

Toshimichi Katsuoka

Junichi Nouda

Hironori Sato

Yasunori Sugiyama

Kaoru Nishimura

Yoshikatsu Maruyama

There is provided a hot-melt transfer ink image-receiving sheet which is excellent in abrasion resistance as well as image density and halftone dot reproducibility of a recorded image and useful as a contact printing film in the photomechanical process. In this hot-melt transfer ink image-receiving sheet having an image-receiving surface on a support , the image-receiving surface has surface roughness (JIS-B0601) of 0.15-0.60 &mgr;m in terms of arithmetic mean deviation Ra and 1.0-3.0 &mgr;m in terms of 10-point height of irregularities Rz.

Hot-melt transfer ink image-receiving sheet

There is provided a lithographic plate material with which a lithographic plate is prepared by the hot-melt transfer recording method utilizing an ink ribbon. The lithographic plate material has an image-receptive layer for hot-melt transfer recording that has a water retention property or can be imparted with a water retention property on a support, and the image-receptive layer has a surface roughness (JIS-B06011994) of 0.15 &mgr;m or more in terms of arithmetic mean deviation Ra and 1.00-3.00 &mgr;m in terms of 10-point height of irregularities Rz. It shows good transfer of the ink layer of ink ribbon and excellent fixation of the ink layer, and it enables production of a printing plate having excellent printing durability.

Lithographic plate material

There is provided a lithographic plate material which can be desensitized by distilled water or a fountain solution used for other lithographic plates, without desensitizing using an etching solution, and with less scumming in non-image portions of the print. The lithographic plate material has an image-receptive layer formed on a support and containing polyvinyl alcohol cross-linked by tetra alkoxy silane hydroxylate, titanium oxide microparticles, and silica having an average particle size of 1 nm to 100 nm. The image-receptive layer has a surface with an arithmetic mean roughness of not less than 0.40 &mgr;m and less than 1.20 &mgr;m, a contact angle of less than 50 degrees with distilled water at room temperature, and ink-receptiveness for hot-melt and lipophilic ink.

Lithographic plate materials and method for making lithographic plates using the same

Disclosed herein are an image-forming material and a process for forming images, which can be applied to second originals used in the field of surveying. The image-forming material comprises a roughened plastics film substrate and a transparent resin layer, colored resin layer, photosensitive resin layer and protective layer formed one over another (in the order mentioned) on the roughened surface of the substrate, said four layers being so designed as un-exposed part thereof to be removed completely by dissolution or swelling during development after exposure to active rays. It permits the formation of a colored relief image without any dyeing step and gives rise to a good image free of base fogging without causing any decrease in printing sensitivity. The process for forming images comprises exposing the above-mentioned image-forming material to active rays and subsequently developing the exposed image-forming material with two kinds of developing solutions consecutively, thereby forming a colored positive relief image on the roughened plastics film substrate, said development causes the un-exposed parts of the transparent resin layer, colored resin layer, photosensitive resin layer and protective layer to be removed by dissolution or swelling.

Image-forming material for producing a colored relief image

Disclosed herein are an image-forming material and a process for forming images. Which can be applied to second originals used in the field of designing and drawing. The image-forming material comprises a roughened plastics film substrate and a transparent resin layer, colored resin layer, and photosensitive resin layer formed one over another (in the order mentioned) on the roughened surface of the substrate, said three layers being so designed as to be removed completely by dissolution or swelling during development after exposure to active rays. It permits the formation of a colored relief image without any dyeing step and gives rise to a good image free of base fogging without causing any decrease in printing sensitivity. The process for forming images comprises exposing the above-mentioned image-forming material to active rays and subsequently developing the exposed image-forming material with two kinds of developing solutions consecutively, thereby forming a colored positive relief image on the roughened plastics film substrate, said development causes the exposed parts of the transparent resin layer, colored resin layer, and photosensitive resin layer to be removed by dissolution or swelling.

Growing community of inventors

Tokyo, Japan

Toshimichi Katsuoka