Abstract:
An arrangement for exposing photosensitive material, especially the photopolymer coatings of printing plates, comprising the screen of a cathode ray tube with the information displayed thereon, an optical system and at least one liquid crystal cell for storing the information, and a light source for transferring the stored information to a photosensitive coating. In particular, an arrangement according to the invention greatly simplifies the exposure of photopolymer printing plates, and enables information reproduced successively on the screen of the cathode ray tube to be displayed simultaneously side by side.
Abstract:
A process for applying photosensitive plates, film or sheeting of a polymerized base material to a metallic support using a reaction product of an oligomer and/or polymer containing active hydrogen atoms and a polyisocyanate as bonding agent.
Abstract:
Crosslinkable photosensitive sheets, plates or film of soluble highly polymerized substances, compounds having at least two photopolymerizable double bonds, a photoinitiator and Nnitrosohydroxylamine derivatives as polymerization inhibitors.
Abstract:
1,147,776. Photographic processes. BADISCHE ANILIN - & SODA - FABRIK A. G. Aug. 3, 1966 [Aug. 4, 1965], No.34759/66. Heading G2C. Printing plates are produced by imagewise exposing a material containing 40-99% by weight of a polyamide and 60-1% of a compound containing at least one photo-polymerizable double bond and at least one hydrogen capable of reacting with an isocyanate, treating the exposed material with a polyisocyanate and then removing the unexposed areas. Specified compounds are acrylamides and methacrylamides, partial esters of glycols with acrylic or methacrylic acid and hydroxy- or aminostyrenes. The polyisocyanate may be hexamethylene-, p-phenylene, 2, 5 or 2, 6-toluene -, or 1 5-naphthalene-di-isocyanate, 4, 4', 4" triphenylmethane tri-isocyanate or tri-methylolpropane/2, 4-toluene di-isocyanate addition product. The material may also contain a thermal polymerization inhibitor and photo-initiator.