Process for electrochemically graining steel plates used as offs

Details Process for electrochemically graining steel plates used as offs Process for electrochemically graining steel plates used as offs

1985-07-03

1986-09-30

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412995, C25F 306

Patent

active

046145710

ABSTRACT:
Disclosed is a process and an electrolyte solution for electrochemically roughening steel-based supports for offset printing plates. The treatment is carried out in a hydrochloric acid electrolyte which comprises at least one wetting agent inhibitor. As a result, a uniform surface topography of the plates is achieved, while largely avoiding the formation of scars. The roughened plates are corrosion-resistant and can be coated either directly or indirectly after first treating the plates to render them hydrophilic.

REFERENCES:
patent: 3979212 (1976-09-01), Peters et al.
patent: 4042477 (1977-08-01), Anderson
patent: 4269677 (1981-05-01), Blomsterberg
patent: 4294672 (1981-10-01), Ohba
patent: 4431724 (1984-02-01), Ovchinnikov et al.
Patent Abstracts of Japan, vol. 6, No. 227, C-134, 1105, p. 152 C 134, 11-12-82.
Patent Abstracts of Japan, vol. 5, No. 144 C-71, 816, p. 131 C 71, 9-11-81.

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