Teijin Limited

Kiyomi Naka

Teruo Takahashi

Akihiro Horike

Tadashi Shingu

Kazuyoshi Suzuki

Michisuke Oe

An improved support comprising (A) a base plate and (B) an adhesive layer formed on the surface of the base plate is provided for making a printing plate from a liquid photosensitive resin. The improvement resides in the inclusion of a tertiary phosphite or tertiary phosphine in the adhesive layer. The improved adhesive layer acts to give reliefs of a good shoulder shape, and this action can be retained over long periods of time. In an alternative embodiment, an activating layer (C) containing a tertiary phosphite or tertiary phosphine is formed on the adhesive layer.

Supports for printing plates

A support for a photosensitive resin for use in making a printing plate using a liquid photosensitive resin, said support comprising a flexible self-supporting base plate and an adhesive layer formed thereon for applying a layer of the photosensitive resin, wherein said adhesive layer is a three-dimensional cured product containing 1 .times. 10.sup.-4 to 1 .times. 10.sup.-2 mol/gr. of the effectively photopolymerizable unsaturated carbon-to-carbon double bond, which has been formed from a composition consisting of (A) a compound containing at least two 1,2-epoxy groups in the molecule; (B) a compound selected from one of the group comprising (i) a compound containing an effectively photopolymerizable unsaturated carbon-to-carbon double bond and a 1,2-epoxy group in the molecule and having a boiling point of at least 120.degree. C., or (ii) a compound containing an effectively photopolymerizable unsaturated carbon-to-carbon double bond and an amino group in the molecule and having a boiling point of at least 120.degree. C.; and (C) an organic curing agent.

Support for photosensitive resin

A light-sensitive composition comprising of

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Hino, Japan

Kiyomi Naka