METHOD OF PREPARING PATTERNS FOR OFFSET PRINT AND COPYING ON PLASTIC FOILS

摘要

The object of the invention is to achieve the reproduction of pen or halftone originals, including the possibility of distinguishing details and achieving line sharpness. The novel process increases, on the one hand, the transparency of the paper base of the negative or positive as a result of saturation with naphtha, paraffin oil or similar substances, and, on the other hand, the difference in the optical densities of the base and the drawing.