Elevated image printing plate

Abstract

Abstract There are disclosed herein photosensitive-thermosensitive compositions of polyvinyl alcohol polymers and polyvinyl acetate polymers having incorporated therein a photo-responsive sensitizer, which compositions are coated onto base surfaces such as sheets of the materials commonly used in the printing art to make either pre-sensitized or wipe-on printing plates, and which compositions react with or without a catalyst to cross-link and copolymerize when energy is applied to the coated sheets in the form of light and heat to make image-printing areas and non-image non-printing areas. Thick coatings of the compositions can be applied of which less than all of the coating in the non-image areas needs to be removed to give, in effect, a deep-etch plate that can be used as a dry offset printing plate.

Inventors

• 👤 I Mellan

Bibliographic Details