Toray Industries, Inc.

Seigo Miyaguchi

Gentaro Ohbayashi

Kazuki Goto

Mitsuru Suezawa

Kimikazu Nagase

Michihiko Ichikawa

Shingo Aoki

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.

Growing community of inventors

Shiga, Japan

Seigo Miyaguchi