Offset printing form and method of making it

Details Offset printing form and method of making it Offset printing form and method of making it

B - Operations, Transporting

41

F

101/64

B41F 9/06 (2006.01) B41C 1/10 (2006.01)

Patent

CA 1199217

OFFSET PRINTING FORM AND METHOD OF MAKING IT Abstract The offset printing form comprises a metal foil (1) rendered oleophobic and a superimposed micro-rough layer (2) in the form of the pattern to be printed, consisting of a resist filled with e.g. soot, possibly a thin metal layer (3) applied onto the resist layer (2), and a top layer (4) of photoresist. For making the offset printing form, a record carrier consisting of a metal foil (1) rendered oleophobic, a superimposed micro-rough resist layer (2) filled e.g. with soot, and a superimposed thin metal layer (3) with an inscribed pattern corresponding to the pattern to be printed, is blanket deposited with a layer (4) of a pho- toresist which is subsequently blanket irradiated, the radiation being reflected several times where the photo- resist layer (4) lies on the metal layer (3), between the interface photoresist-aluminum and photoresist-air, and being subsequently developed. Simultaneously with development, or subsequently, exposed regions of metal layer (3) are removed, and finally the exposed regions of resist layer (2) are removed.

423104

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