Process for the production of a surface structure on printing me

Details Process for the production of a surface structure on printing me Process for the production of a surface structure on printing me

1991-10-08

1992-09-15

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25F 314

Patent

active

051475138

ABSTRACT:
A process for the production of a surface structure on a printing cylinder for offset printing presses, wherein said cylinder includes a galvanically coated hard chrome surface, comprising applying a thin layer of alkali-resistant negative-resist material to said hard chrome surface, contacting the resist material with a positive raster, irradiating said cylinder to harden a portion of the resist material, removing the unirradiated resist material, and etching said hard chrome surface by forming a circuit with said printing cylinder as the anode, contacting said hard chrome surface with a sodium hydroxide solution which has passed through a cathode, and removing the hardened resist material from said printing cylinder.

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