Apparatus for making masks and/or block copies for printing

摘要

Masks or block copies for printing are fabricated by an apparatus comprising: a picture input device for obtaining through a filter a signal relating to the optical density of the picture of an object to be introduced as input; a picture processing device for subjecting the resulting picture optical density data from the picture input device to operational processing thereby to form a diagram figure; and a device for forming a mask or block copy for printing on the basis of the resulting diagram figure data obtained by means of the picture processing device.