Fuji Photo Film Company, Limited

Sumitomo Light Metal Industries, Ltd.

Nippon Light Metal Company, Ltd.

Azusa Ohashi

Hirokazu Sakaki

Akira Shirai

Hisao Ohba

Masaru Watanabe

Kazutaka Oda

Shin Tsuchida

Yoshikatsu Hayashi

Tadao Yoyama

Yoshio Okishi

Zenichi Tanabe

Nobuyuki Kita

Kazushige Takizawa

Toshio Uchida

Haruo Nakanishi

Shiro Terai

Teruo Mori

Yukio Yabuta

Masaru Odawara

A support for a lithographic plate produced by a process which comprises:

Grain structure for lithographic printing plate supports

An aluminum alloy support for a lithographic printing plate, comprising a cold rolled plate of aluminum alloy comprising, in % by weight: 98.0% or more Al; Fe in an amount of from 0.15 to 1.2% as an alloying element; and impurities, each of which is present in an amount of from 0.0% but less than or equal to 0.15%, wherein the cold rolled plate has a distribution of Al--Fe and Al--Fe--Si based intermetallic compounds formed from the alloy, having grain sizes of greater than 0 microns but less than or equal to 3 microns, which are positioned directly under an outer surface of the cold rolled plate and wherein the surface of the cold rolled plate is roughened by etching or electrochemical etching and anodically oxidized.

Aluminum alloy support for lithographic printing plate

An aluminum alloy, a lithographic printing plate support, a lithographic printing plate using the aluminum alloy are disclosed. The aluminum alloy is comprised of aluminum containing 0.20 to 1.0% Fe and 0.005 to 0.1% of elements selected from the group consisting of Sn, In, Ga and Zn. The support composed by the aluminum alloy can be chemically etched with an acid and/or an alkali solution and after undergoing etching the surface of the support is uniformly etched. The uniformly etched surface may be provided with a subbing layer or an anode oxidation film. The support is coated with a light-sensitive layer and utilized as a lithographic printing plate.

Aluminum alloy, a support of lithographic printing plate and a

A lithographic printing plate support and a process for producing it are disclosed. The plate is produced by providing an aluminum alloy material which is comprised of 0.20 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga and Zn and the remainder being aluminum. The alloy may further contain 0.1 to 2% Cu. After providing the aluminum material either or both of its surfaces are subjected to a chemical etching treatment in order to provide a uniform and dense grain structure on the surface forming primary pits in the surface having a particularly defined average size. The surface is then subjected to electrochemical etching treatment in an acidic electrolytic solution in order to provide secondary pits on the surface also having a particularly defined average size. The support base may be further treated to provide in additional coating thereon or directly coated with a light-sensitive layer in order to provide a light-sensitive lithographic printing plate. By providing the particular alloy material and subjecting it to the disclosed treatment the light-sensitive layer has good adhesion with respect to the support.

Support for lithographic printing plate and lithographic printing plate

A method of replenishing a developer during the development of photosensitive plates in a conveyor-type automatic developing machine connected to a replenishing device in which the dissolution of the photosensitive layer in the non-image area of a photosensitive plate is measured with a sensor. The sensor is positioned at a certain point in the developing zone of the machine, and, when the measured dissolution reaches a certain level, the replenishing device is automatically actuated to supply a predetermined amount of replenisher to the developer.

Method of replenishing a developer for photosensitive plate

A support for a lithographic plate and process for producing a support for such a plate are described, which process comprises:

Supports for lithographic printing plates and process for producing the

A support for a lithographic plate comprising an aluminum plate or an aluminum-alloy plate the surface of which has been grained such that the grain structure comprises pits and;

Electrolytically grained aluminum support for making a lithographic

A method for preparing a support for a planographic printing plate using an electrolytic surface treatment of an aluminum plate is disclosed, wherein an alternating charge voltage is applied to the aluminum plate in an acidic electrolyzing bath, and the wave form representing the voltage includes an intermission of zero voltage in at least one of the anode or the cathode phases, and is such that the electric quantity for the anode phase is larger than the electric quantity for the cathode phase.

Method for preparing a support for a lithographic printing plate

A light-sensitive printing plate having a matt layer, which is removable at development, on the surface thereof.

Contact photographic process for producing a planographic printing plate

A light-sensitive copying material comprising at least two organic coating layers on a support, at least one of the coating layers being a light-sensitive layer which comprises an O-quinone diazide compound whose alkali solubility is increased by irradiation with active rays.

Light-sensitive O-quinone diazide containing copying material

Positive working O-quinone diazide photocopying process with organic

Light-sensitive printing plate with matt overlayer

A method of producing a support for a printing plate comprising treating an aluminum plate, which has been oxidized by anodizing and then etched, with hot water or with water vapor.

Growing community of inventors

Shizuoka, Japan

Azusa Ohashi