Photographic multi-tone separation process

Abstract

Abstract A PROCESS FOR THE SEPARATION OF TONAL BANDS FROM AN ORIGINAL TRANSPARENCY HAVING MULTIPLE TONAL BANDS. THE PROCESS INCLUDES A PHASE WHICH MAKES A SERIES OF MASKS OF THE ORIGINAL TONAL BANDS BY CONTROLLED EXPOSURE THROUGH THE ORIGINAL TRANSPARENCY AND A PHASE IN WHICH A NEW PHOTOSENSITIVE MATERIAL IS EXPOSED THROUGH THE MASKS AND SCREENS, OR, ALTERNATIVELY, USING THE MASKS WITH LIGHTSENSITIVE COLOR DYES. A FINAL PRODUCT IS OBTAINED IN WHICH THE AREAS CORRESPONDING TO THE ORIGINAL TONAL BANDS HAVE A CHANGED PICTORIAL REPRESENTATION AND THESE AREAS ARE REPRESENTED BY SCREEN PATTERNS, OR, ALTERNATIVELY, COLORED BANDS. A SPECIFIC EXAMPLE OF THE PROCESS STARTS WITH ALTITUDE CHARTS HAVING THREE TONAL BANDS PRODUCED BY THE UNIVERSAL AUTOMATIC MAP COMPILATION EQUIPMENT (UNAMACE). BY MEANS OF CONTROLLED EXPOSURE OF THE ORIGINAL ALTITUDE CHART, A SERIES OF MASKS OF THE ALTITUDE BANDS ARE PRODUCED AND THE MASKS ARE THEN USED IN MAKING A FINAL PRODUCT IN WHICH THE AREAS CORRESPONDING TO THE ORIGINAL TONAL BANDS ARE REPRESENTED AS SCREEN PATTERNS OR, ALTERNATIVELY, AS COLORED BANDS.

Inventors

• 👤 Michael J Kelly

Bibliographic Details