Half-tone image reproducing method of improving gradation without loss of resolution

摘要

Input data on a colored or monochromatic image having a gradation are recorded on a light transmissive sheet to prepare mask originals. The data on the colored image are separated into data corresponding to red, green and blue color components and the data on each of the color components are converted to dither data. At least two mask originals are prepared for each color on the basis of the dither data associated with the color. Photosensitive pressure-sensitive recording paper coated with microcapsules each encapsulating a chromogenic material is exposed to light through the mask originals and is then subjected to development under pressure, whereby the image is reproduced thereon. The mask originals carry at least two different patterns of image data for each color.