Konishiroku Photo Industry Co., Ltd.

Mitsubishi Chemical Industries Limited

Konica Corporation

Mitsubishi Kasei Corporation

Norihito Suzuki

Kiyoshi Goto

Hiroshi Tomiyasu

Takeshi Yamamoto

Akio Iwaki

Toru Aoki

Yoshihiro Maeda

Akeo Kasakura

Shigeki Shimizu

Kazuo Noguchi

Disclosed is a light-sensitive litho printing plate comprising:

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

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.

Photosensitive diazo composition and photosensitive diazo lithographic

A photosensitive composition of this invention comprises:

Photosensitive composition

A support for lithographic printing plate having provided on an iron material (i) a layer substantially consisting of chromium and/or chromium oxide and (ii) a layer consisting essentially of a water soluble polymeric compound and at least one selected from water soluble salts of calcium, magnesium, zinc, barium, strontium, cobalt, manganese, nickel and silicon, in this order.

Support for lithographic printing plate

Disclosed is a support for lithographic printing plate having an electrodeposited chromium layer on an iron material, characterized in that the surface of said electrodeposited layer has a shape in which crystalline products with angles protrude thereon, the elemental composition in the surface side portion of said electrodeposited layer consists substantially of chromium and oxygen and the ratios of atomic concentrations of chromium and oxygen at said portion are substantially even at the same depth from every point on said surface.

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Hino, Japan

Norihito Suzuki