Toray Industries, Inc.

Kimikazu Nagase

Kazuki Goto

Gentaro Ohbayashi

Mitsuru Suezawa

Ken Kawamura

Kunitaka Fujiyoshi

Takashi Taira

Michihiko Ichikawa

Shigehiro Hano

Yoshihiro Chujo

Sachio Suzuki

Akihiko Iihara

Masaaki Ishiyama

Hisayoshi Yamada

Shingo Aoki

Hiroyuki Takahata

Kousuke Yotsuduka

Seigo Miyaguchi

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

This invention provides a directly imageable planographic printing plate precursor with excellent image reproducibility without requiring any complicated process after irradiation with a laser beam. To solve the above problem, this invention is constituted as describe below. A directly imageable waterless planographic printing plate precursor, in which at least an ink acceptable layer and a silcone rubber layer are laminated in this order on a substrate, wherein when the printing plate precursor is measured by TG-GC/MS in a hellium current at a heating rate of 10&deg; C./min, a decomposition product is generated in a temperature range of 100&deg; C. to 200&deg; C. by 0.001 g/m to 1 g/m per plate area.

Directly imageable waterless planographic printing plate precursor, and directly imageable waterless planographic printing plate

A directly imageable waterless planographic printing plate, which has at least the heat sensitive layer and an ink repellent layer in this order on a substrate, having a high sensitivity and good image reproducibility and allowing a heat sensitive layer to remain even after development is produced by imagewisely irradiating a precursor of the printing plate with a laser beam, pre-treating the precursor by a pre-treatment liquid containing an amine compound by 0.1 to 30 wt % based on the weight of the entire pre-treatment liquid, and removing the ink repellent layer at the laser beam irradiated area, in this order, such that the heat sensitive layer is at least partially left on the printing plate after completion of the above steps.

Method of producing directly imageable waterless planographic printing plate

The invention in this application relates to a toner composition for electrostatic latent image development which is characterized in that, in a toner composition comprising at least binder resin, colorant and charge control agent, to be used in a print forming method provided with a print fixing device which fixes the toner image on a recording medium by means of a light flash, the concentration of benzene generated by heating for 90 seconds at 330&deg; C. is no more than 60 &mgr;g/g, and the invention provides a toner composition for electrostatic latent image development which either extends the filter life or does not require the use of a filter.

Toner composition for developing electrostatic latent image

Intermediate transfer material, and an image forming method using it

Growing community of inventors

Shiga, Japan

Kimikazu Nagase