Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1988-11-17
1990-02-20
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
20412935, 20412975, 20412995, 2041295, C25F 304
Patent
active
049023896
ABSTRACT:
A process for producing an aluminum support for a printing plate, which involves electrochemical graining of the support, is disclosed. The support is passed through an acidic electrolyte of an electrolytic cell along a path of travel maintained a distance above alternatingly distributed anodes and cathodes in a face-to-face relationship with the aluminum-containing support. Simultaneously, there is applied a d-c voltage between the alternating anodes and cathodes to produce an electrochemically roughened support.
The electrochemically roughened supports produced in accordance with the invention have a grained structure. characterized by a uniform and dense distribution of high depth-to-diameter ratio pits and exhibit satisfactory print quality and running characteristic without causing any uneveness.
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patent: 4214961 (1980-07-01), Anthony
patent: 4272342 (1981-06-01), Oda et al.
patent: 4326933 (1982-04-01), Sabatka et al.
patent: 4597837 (1986-07-01), Oda et al.
Kakei Tsutomu
Nishino Atsuo
Fuji Photo Film Co. , Ltd.
Valentine Donald R.
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