Process for the treatment of areas of aluminium plates for use in impressu00e7o of scanned images, process for produu00c7u00e7o sheets of aluminium plate sensitized and pre-filled

摘要

Process for the treatment of areas of aluminium plates for use in impressu00e7o of scanned images, process for produu00c7u00e7o sheet aluminium power aware and plate.The present invention relates to a process for the treatment of work surfaces of aluminum plates for use in printing of digital images comprising the steps of: (a) degrease and deoxidization of an aluminum plate with alkaline solution; (b) granitau00e7u00e3o by imersu00e3 The aluminum plate in a bath containing a solution of one or more acids.In the presence of an alternating electrical current transferred by graphite electrodes; (c) simultaneous cleaning of the surfaces of the plates by the action of a solution containing an acid or an alkali; (d) anodizing the aluminum plate by immersion in a bath containing a solution of an acid.In the presence of a direct current transferred by the electrodes; and (E) chemical treatment of both work surfaces of aluminum sheets with a composition sensitive to radiation suitable for providing a photosensitive coating in both those areas of work of the Aluminum plate.The present invention also relates to a process for the production of an aluminum plate, pre sensitized, for use in printing of digital images, containing a radiation sensitive composition applied on both sides and the plate for lithographic printing of images enter Is.