Toray Industries, Inc.

Ken Kawamura

Norimasa Ikeda

Kazuki Goto

Kimikazu Nagase

Michihiko Ichikawa

Mikio Tsuda

Masanao Isono

Mitsuru Suezawa

Masaya Asano

Koichi Fujimaru

Masahiro Oguni

Shigeo Abiko

Shun-ichi Yanagida

Kunitaka Fujiyoshi

Tetuo Suzuki

Yuzuru Baba

Keiko Sugikawa

Akihiko Iihara

Kouichi Fujimaru

The invention is a directly imageable waterless planographic printing plate precursor comprising: at least a heat insulating layer, a heat sensitive layer, and an ink repellent layer that are provided in that order on a substrate, wherein a transmittance of the heat insulating layer for a light having a wavelength within a range of 400 to 650 nm is at most 15% over the entire range of the wavelength. The invention provides a directly imageable waterless planographic printing plate precursor that allows measurement of the dot area ratio on the printing plate with a densitometer or the like.

Directly imageable waterless planographic printing plate precursor

A directly imageable planographic printing plate that is high in image productivity and easy to check is produced by using a directly imageable planographic printing plate that comprises at least a substrate, a thermo-sensitive layer and a ink-repelling layer in this order, wherein the thermo-sensitive layer in the printing area contains a dye that has an absorption maximum in the range of 400 nm to 700 nm, and the difference between the reflected absorption of the non-printing area and the reflected absorption of the printing area, observed at the absorption maximum wavelength of the dye, is not less than 0.3 and not more than 2.0.

Directly imageable planographic printing plate and production method thereof

A directly imageable waterless planographic printing plate precursor is a laminate of, in turn, at least a heat sensitive layer and a silicon rubber layer on a substrate. The heat sensitive layer includes (A) a light-to-heat converting material and (B) a compound which contains N&mdash;N bonds.

Directly imageable waterless planographic printing plate

Plate for waterless lithographic

Direct drawing type waterless planographic original form plate

Water-less lithographic raw plate

According to the present invention there is provided a laminate comprising a photosensitive layer and a silicone rubber layer both laminated successively onto a base substrate, in which a main component of the photosensitive layer is formed by an adduct obtained by an addition reaction of a photopolymerizable glycidyl (meth)acrylate and a monoglycidyl ether compound not having a photopolymerizable group with a diamine compound. Because of using a photosensitive layer having such a specific composition as mentioned above, the dry planographic printing plate obtained from the present invention is suitably employable in commercial web offset printing and newspaper web offset printing.

Laminate used for the production of a dry planographic printing plate

The present invention is concerned with a printing plate of which image formation is done by photoirradiation, having a front side covered waith a peelable or removable protective layer which contains a photofading material. The printing plate is safe against fogging to light and can be used under ordinary illumination.

Printing plate

Growing community of inventors

Shiga, Japan

Ken Kawamura