Nippon Paint Compnay, Ltd.

Ajinomto Co., Inc.

Nippon Paint

Seiji Arimatsu

Kazunori Kanda

Takakazu Hase

Kiyomi Sakurai

Yoshifumi Ichinose

Chitoshi Kawaguchi

Katsuji Konishi

Koichi Kimoto

Yasusi Umeda

Tsuguo Yamaoka

Koji Takeuchi

Katsukiyo Ishikawa

Yasuyuki Takimoto

Masao Honma

Shin Saito

Kunsei Tanabe

Osamu Nanba

Yasuhiro Kimura

Atsushi Mashita

Masakatsu Nishimura

Koichi Nagata

Tahahiro Tsunoda

Syoichi Asada

The present invention provides an improvement of the direct lithographic printing plate making process using ink-jet printing, which provides a printing plate having excellent resolution. Accordingly, the present invention provides an improvement of a process for producing a lithographic printing plate comprising selectively forming a light transmittable oxygen barrier film on a photopolymerizable layer of a photosensitive plate, exposing to light and then removing uncured portion on which the oxygen barrier film is not covered, wherein a protective layer which is capable of transmitting oxygen gas and the light to cure the photopolymerizable layer is formed on the photopolymerizable layer, a photosensitive plate therefor and an aqueous ink composition therefor.

Process for producing lithographic printing plate, photosensitive plate

Disclosed is an alkali developable photosensitive resin composition useful for an offset printing plate, which has excellent developability and provides long life of a developer. The photosensitive resin composition comprising:

Alkali developable photosensitive resin composition comprising a binder

Disclosed is a photosensitive composition used for offset printing, which provides an offset printing plate with excellent durability and developability. The photosensitive composition comprises: (I) a film-forming binder resin, (II) a photosensitive substance, and (III) a microgel having a particle size of 0.01 to 2.0 .mu. prepared by emulsion polymerization using a polymeric emulsifier having an Sp value of 9 to 16.

Photosensitive composition for offset printing comprising a binder, a

A photopolymerizable composition comprising

Photopolymerizable composition and photosensitive lithographic printing

The present invention provides an improved process by which dissolved oxygen is effectively removed from a photosensitive resin layer of a photosensitive resin plate. The process comprises preliminarily exposing the photosensitive resin to light to quench oxygen dissolved in said photosensitive resin layer before conducting a main exposure. The photosensitive resin layer is prepared from a photosensitive resin composition which comprises:

Process for exposing a photosensitive resin composition to light

Disclosed herein is a polyether acrylamide derivative of the following general formula (I): ##STR1## as well as an active energy ray curable resin composition comprising at least one polyether acrylamide derivative of the above general formula (I) and a cured product produced by curing such an active energy curable resin composition with active energy rays.

Polyether acrylamide and active energy ray curable resin composition

Disclosed is a method for making printing plates which comprises:

Method for directly making printing plates using ink-jet system

Disclosed is a photosensitive resin composition which, can be hot melt molding and and is water-developable. The composition does not need the preliminary exposure process and when cured has suitable hardness and printing properties. The photosensitive resin composition comprises;

Photosensitive resin composition

A photosensitive resin composition which comprises as an essential component a resin emulsion comprising resin particles, which do not make coalescence to form a continuous film when the resin emulsion is applied on a substrate and dried, obtained by subjecting a polymerizable composition comprising at least one polymerizable vinyl monomer and at least one of a photo-reactive compound and a photo-initiator dissolved therein to emulsion polymerization.

Photosensitive aqueous emulsion resin composition of polystyrene or

A method for producing a lithographic printing plate which comprises, as a support, an iron foil prepared by electroforming and electroplated with a hydrophilic metal on both surfaces, and an oleophilic image on the surface of the iron foil in contact with the electrolyte during the electroforming.

Method for producing a lithographic printing plate

A photosensitive plate suitable for preparation of a waterless lithographic printing plate, which comprises a support material and a photosensitive layer provided thereon, said photosensitive layer being made of a photosensitive composition comprising an emulsion polymerization product of an acrylic or methacrylic monomer having a perfluoroalkyl group in the side chain and a water-soluble photosensitive substance resin whose water-solubility is variable by irradiation of ultraviolet rays.

Waterless negative or positive lithographic printing plate preparation

A lithographic printing plate which comprises:

Lithographic printing plate

A process for preparing photosensitive resin cylinders which-comprises winding a photosensitive resin sheet on and around the surface of a cylinder without any material overlapping of or spaces between the edge portions of the wound resin sheet, and applying to the cylinder under rotation a roll rotating in contact with the surface of the resin sheet while heating so as to join the edge portions of the resin sheet to one another by melting and to make uniform the thickness of the resin sheet.

Production of photosensitive resin cylinders

A toner composition for electrostatic photography which comprises (A) toner powder comprising a base resin and a coloring agent and having an average particle size of not more than 30 microns and (B) silica powder coated on its surface with the base resin of the toner powder.

Toner for electrostatic photography containing resin coated silica

Printing plate production apparatus wherein a latent image is formed at the surface of photoconductive insulating sheet, either by an optical system for effecting sheet exposure or by a laser emission scanning system which constitutes the terminal of a facsimile transmission system, this latent image is developed by toner particles, for example, which are applied on, but not fixed on the photoconductive sheet, the developed image is temporarily transferred onto a printing plate with which the photoconductive sheet is brought into pressure contact, and the printing plate carrying the developed image is exposed to light which may effect chemical changes in the printing plate to harden portion thereof unprotected by toner particles after which the printing plate receives treatment to remove toner particles and unhardened portions thereof. In the means of the invention a sheet carrying a developed image initially transmitted by a single facsimile transmission system may be employed as a master copy which is mounted in the exposure system and serves in production of a plurality of identical printing plates.

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Hirakata, Japan

Seiji Arimatsu