Photoreactive coating compositions and photomechanical plates produced therewith
AssigneeThe Richardson Company
InventorThaddeus M. Muzyczko
Life of this patent
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Abstract
A photoreactive coating composition, particularly suited for use in a lithographic plate, is characterized by both reduced exposure time requirements and an intense visual image which is immediately produced upon exposure of the composition to light permitting visual inspection during imaging. The photoreactive composition has a diazo resin layer and an overlayer which includes a photochromic compound (e.g. an indolinobenzospiropyran compound) and a light sensitive polymer selected from the group cinnamoylated and acrylated photopolymer resins.
Claims30
A high-speed photomechanical presensitized plate suited for use as a lithographic plate and the like on which a visual latent image is produced immediately upon exposure to light, said plate comprising:
- a support member;
- a light sensitive, water soluble diazo resin layer over said support member;
- and, an overlayer coating on said diazo resin layer, said overlayer coating including in admixture, a photochromic compound and a light sensitive polymer selected from the group cinnamoylated and acrylated resins.
A high-speed photomechanical presensitized plate suited for use as a lithographic plate and the like on which a visual latent image is produced immediately upon exposure to light, said plate comprising:
- a support member;
- a light sensitive, water soluble diazo resin layer over said support member;
- and, an overlayer coating on said diazo resin layer, said overlayer coating including in admixture, an indolinobenzospiropyran photochromic compound and a light sensitive polymer selected from the group cinnamate ester and acrylic ester photopolymer resins.
A high-speed photoreactive coating composition which is adapted to produce a visual latent image immediately upon exposure to light, said composition comprising:
- a light sensitive, water soluble diazo resin layer;
- and, an overlayer coating on said diazo resin layer, said overlayer coating including, in admixture, a photochromic compound and a light sensitive polymer selected from the group cinnamoylated and acrylated resins.
Dependencies are inferred from the claim text.