Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Mitsubishi Kasei Corporation

Mitsubishi Chemical Corporation

Mitsubishi Chemical Industries Limited

Konica Minolta Medical and Graphic, Inc.

Kiyoshi Goto

Hiroshi Tomiyasu

Takeshi Yamamoto

Hideyuki Nakai

Noriyasu Kita

Tetsuya Masuda

Miyuki Hosoi

Norihito Suzuki

Katsura Hirai

Yasuo Kojima

Takeo Akiyama

Hideaki Mochizuki

Tetsuya Taniguchi

Yoshio Kurita

Hiroh Kawada

Yoshiko Kobayashi

Yoshihiro Maeda

Masafumi Uehara

Akeo Kasakura

Shigeki Shimizu

Yasunori Wada

Koji Fukazawa

Naoshi Kunieda

Yutaka Adachi

Hitoshi Mitake

Kazuo Noguchi

Keiichi Yumiki

Yasuji Tomita

Tamiya Matusoka

Yoshiko Fujita

Kunitaka Naito

Masaaki Tsuchiyama

Hideaki Mochizuku

Junko Tadano

A printing plate material having an aluminum support on which an image forming layer is provided, wherein a wireless IC tag is provided on a part of the printing plate material.

Printing plate material, printing plate manufacturing method, and printing method

A method for recovering a resin support from an image forming material comprising a resin support having thereon an image forming layer is disclosed, in which the image forming material is immersed into a dipolar aprotic solvent or an alkaline alcohol and the image forming layer is dissolved with stirring under heat.

Recovering method of support and useful ingredient from image forming material

Image-forming material

Disclosed is a color image-formable material for forming and transferring a color image. The color image-formable material has a support, a cushion layer provided on the support and color light-sensitive layer containing a light-sensitive composition and a coloring agent provided on the cushion layer. It gives a transferred image by forming a color image portion by imagewise exposure and developing treatment and then transferring the color image portion alone to an image-receiving material. The cushion layer has a hardness of 40 to 85 and a thickness of 15 .mu.m to 100 .mu.m. A process for preparation of the color image-formable material is also disclosed.

Color image forming process through transfer of image portion to

Disclosed are a color image-formable material which comprises a support, a cushion layer provided on the support and a color light-sensitive layer containing a light-sensitive composition and a coloring agent provided on the cushion layer and gives a transferred image by forming a color image portion by imagewise exposure and developing treatment and then transferring the color image portion alone to an image-receiving material,

Color image-formable material and process for preparing the same

A photosensitive lithographic printing plate comprises a conductive support and provided thereon, a photoconductive layer of a composition comprising a photoconductor and an esterified compound of o-naphtho-quinonediazide sulfonic acid with a phenol resin, the phenol resin being a polycondensation compound of a monovalent phenol with an aldehyde or a ketone, and the content of the o-naphthoquinonediazide sulfonic acid residue being 0.4.times.10.sup.-3 to 3.0.times.10.sup.-3 mole per gram of the photoconductive layer.

Lithographic photosensitive printing plate comprising a photoconductor

A process for manufacturing a planographic printing plate using a photosensitive planographic printing plate comprising a conductive support and provided thereon, a photoconductive layer containing an alkali soluble resin, a photoconductor and a photosolubilizable photosensitive compound comprises the steps of forming an electrophotographic latent image on the photoconductive layer, developing the latent image with liquid developer to form a toner image layer, uniformly exposing overall to actinic light the entire photoconductive layer, and removing the photoconductive layer where no toner image layer has been formed, the transmission density of the toner image layer to the actinic light being not less than 0.6, and the transmission density per unit thickness of the toner image layer to the actinic light being not less than 0.03 dm.sup.2 /g.

Process for manufacturing planographic printing plate

A light-sensitive coating liquid, comprising, as an organic solvent, at least one substance represented by the formulae (I) to (III) shown below: ##STR1## wherein R.sub.1 represents an alkyl group having 1 to 4 carbon atoms, R.sub.2 to R.sub.7 each represent hydrogen atom or an alkyl group having 1 to 3 carbon atoms, with the proviso that at least one of R.sub.2 to R.sub.7 is an alkyl group. The light-sensitive coating liquid of this invention is improved in odor, low in toxicity and yet excellent in storability, and is also suitable for preparation of a light-sensitive lithographic printing plate improved in press life and dye remaining.

Light-sensitive coating liquid

The invention provides an apparatus for conveying a pile of photosensitive printing plates in which a support is covered thereon with photosensitive resin. The apparatus comprises a base plate and a pair of end plates for holding the pile of photosensitive printing plates therebetween. The pair of end plates is vertically mounted on the base plate so that the pile of photosensitive printing plates is vertically held between the pair of end plates on the base plate.

Apparatus for conveying presensitized lithographic printing plates

There are disclosed a photosensitive composition which comprises:

Lithographic printing plate utilizing aluminum substrate with

Disclosed is a light-sensitive litho printing plate comprising:

Light-sensitive litho printing plate with cured diazo primer layer,

A photosensitive composition comprising (a) a 1,2-naphthoquinone-2-diazido-4-sulfonic acid ester compound, (b) alkali-soluble resin, (c) a halomethyloxadiazole compound which releases halogen free radicals by irradiation with actinic rays and (a) a dye which interacts withthe decomposition product of said halomethyloxydiazole compound and discolors or develops color. The composition exhibits excellent development latitude, light safety, visible-on-exposure characteristic and printing resistance.

Photosensitive composition containing

A positive photosensitive planographic printing plate is disclosed which has a photosensitive layer comprising in combination a specific o-naphthoquinonediazidosulfonic ester and a resin having a specific structural unit(s). Said photosensitive layer may also contain a novolak resin and/or an organic acid.

Positive photosensitive planographic printing plates containing specific

Disclosed is a light-sensitive lithographic printing plate which comprises an aluminum or aluminum alloy support having been pretreated and a light-sensitive layer provided thereon, wherein the surface of the support adjacent to the light-sensitive layer is treated by use of an aqueous solution containing at least one selected from the group consisting of nitric acid, nitrate, nitrous acid and nitrite. According to this invention, lithographic printing plates which are free from stain due to residual light-sensitive layer, excellent in developability, good in water retention at image area and excellent in press life, can be obtained.

Light-sensitive lithographic printing plate wherein the support is

A photosensitive composition principally comprised of a photosensitive diazo resin and a lipophilic high molecular compound, wherein said photosensitive composition further contains a metal complex dye soluble in an organic solvent. Also disclosed is a photosensitive lithographic printing plate employing such a photosensitive composition.

Growing community of inventors

Hino, Japan

Kiyoshi Goto