B - Operations – Transporting – 41 – N
Patent
B - Operations, Transporting
41
N
101/119, 96/247
B41N 1/04 (2006.01)
Patent
CA 1058962
ABSTRACT OF THE DISCLOSURE A letter press printing plate is disclosed for wrapping around a drum. The printing surface is formed with a light-sensitive material layer on a metal backing plate with two different levels, the high level representing areas of solid or dark tones of printing and the low level representing areas of light tones of printing. The printing plate overcomes the problem of even transfer of ink from the solid or jark tones of printing areas and the light tones of printing areas. A method of forming the letter press printing plate is also disclosed wherein a photo polymer layer on a backing plate is first ex- posed to a negative representing areas of solid or dark tones and light tones of printing. The photo polymer layer is then dis- solved away to the backing plate in areas where no printing occurs and formed into a two-level printing surface with the areas of solid or dark tones being at a high level and the areas of light tones being at a low level.
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