Photographic masks for tonal correction

Details Photographic masks for tonal correction Photographic masks for tonal correction

G - Physics

03

F

96/262

G03F 3/06 (2006.01)

Patent

CA 1310853

TITLE PHOTOGRAPHIC MASKS FOR TONAL CORRECTION ABSTRACT OF THE INVENTION Process for production Of photographic masks for tonal correction by dry dot etching comprising exposing a mask film, e.g., positive film, behind a film combination of half-tone positives and negatives that contains at least one pair of a positive and a negative of the same color separation said pair being separated from one another by a spacer film, e.g., transparent matt film, etc . The half-tone value at the points to be corrected are in the range of 30-70%.

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