초록 ▼

A very simple and easy method for preparing dry planographic printing plates having a high printing performance and durability in the absence of dampening water is proposed. The method comprises the steps of (a) coating one surface of substrate which is transparent to ultraviolet light with an uncur

A very simple and easy method for preparing dry planographic printing plates having a high printing performance and durability in the absence of dampening water is proposed. The method comprises the steps of (a) coating one surface of substrate which is transparent to ultraviolet light with an uncured photocurable silicone, (b) bringing the thus coated surface into direct contact with a surface of a base plate to form a laminate, (c) providing on the other surface of the substrate an image pattern made of a material which is opaque to ultraviolet light, (d) irradiating the laminate with ultraviolet light from above the image pattern and (e) separating the substrate from the base plate to allow a portion of the photocured silicone coating to transfer to the surface of the base plate, and a portion of the uncured silicone coating to stay in situ on the surface of the substrate.

대표청구항 ▼

A method for the preparation of a dry planographic printing plate comprising the steps of (a) coating one surface of a substrate which is transparent to ultraviolet light with an uncured photocurable silicone, (b) bringing the surface of the substrate thus coated into direct contact with a surface o

A method for the preparation of a dry planographic printing plate comprising the steps of (a) coating one surface of a substrate which is transparent to ultraviolet light with an uncured photocurable silicone, (b) bringing the surface of the substrate thus coated into direct contact with a surface of a base plate which has been treated with a primer selected from the group consisting of vinyl tris(2-methoxyethyoxy) silane, 3-(glycidoxypropyl trimethoxy silane, N-(trimethoxysilylpropyl) ethylenediamine, 3-methacryloxypropyl trimethoxy silane, 3-aminopropyltriethoxy silane, mixtures thereof, and partial (co)hydrolyzates thereof, to form a laminate, (c) producing an image pattern made of a material which is opaque to the ultraviolet light on the other surface of the substrate electrophotographically or manually by applying an ultraviolet opaque ink directly on said other surface, (d) irradiating the laminate with ultraviolet light from the side of the image pattern, and (e) separating the substrate from the base plate to allow a portion of the photocured silicone coating to transfer to the surface of the base plate, and a portion of the uncured silicone coating to stay in situ on the surface of the substrate.