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Gevaert Photo Producten NV
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Gevaert Photo Producten NV
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Application filed by Gevaert Photo Producten NVfiledCriticalGevaert Photo Producten NV
Publication of ES228377A1publicationCriticalpatent/ES228377A1/en
Process for obtaining hectographic impressions, characterized in that a photographic reproduction is taken on a light sensitive material provided with a silver halide emulsion containing, preferably, little or no color component insoluble in the finely divided water, in which it reveals the image with tannic acid, so that an inverted image is formed in positive relief of the original as a matrix, which is put in contact with a printing paper in the presence of a printing liquid, containing the matrix and/or the paper of printing and/or printing liquid, each separately or in combination, products for converting the color component into a dye, so that upon contact with the printing paper, a positive color copy of the original appears on the paper of print. (Machine-translation by Google Translate, not legally binding)
ES0228377A1955-05-111956-05-09Procedure to obtain holographic impressions. (Machine-translation by Google Translate, not legally binding)
ExpiredES228377A1
(en)
Improvements in the process of obtaining paper sheets for copies, which allows to obtain several simultaneous copies without using paper carbon. (Machine-translation by Google Translate, not legally binding)
Procedure for the appreciation of the results of a printing prior to the recording of the printer elements. (Machine-translation by Google Translate, not legally binding)
Procedure for the production of an image of transfer by diffusion in an image receiving material (Machine-translation by Google Translate, not legally binding)