Abstract: A color-separation film is produced for one or more original pictures which require trimming by carrying out a separation process by means of a color scanner. The original pictures are adhered to a light-shielding sheet. The light-shielding sheet is provided with trimming windows through which all or portions of the original pictures are viewable. The shielding sheet and the original pictures viewable therethrough are scanned to obtain color-separated images which images are then recorded on a photosensitive sheet which is mounted on a recording cylinder. Further, a binary-coded signal is developed which indicates the regions on the light-shielding sheet which lie outside the trimming windows. The binary-coded picture signal is used for forming a mask region on the photosensitive sheet. Accordingly, a subsequent contact-printing procedure is simplified and the printing process can be carried out more reliably and accurately.

Abstract: Each of original pictures is pasted up to a mask sheet in which respective trimming areas corresponding to each of said original pictures is transparent and other areas thereof are made of a material having high reflective coefficient, according to a desired layout, and the mask sheet is set up on the scanning drum of the colors scanner to carry out photoelectric scanning, and then a picked up signal basing on difference in scanning light beam reflection level between the trimmed areas of the original pictures and the areas having high reflective coefficient, is appropriately switched to exposingly record the desired color separation picture image and/or a mask pattern.