Method for producing support for printing plate

Details Method for producing support for printing plate Method for producing support for printing plate

1990-10-05

1992-10-06

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412975, C25F 304

Patent

active

051528770

ABSTRACT:
A method for producing a printing plate support without using sodium hydroxide is provided. An aluminum plate is subjected to cathodic electrolysis in a neutral salt aqueous solution, electrochemically surface-roughened in an acid aqueous solution, and subjected to cathodic electrolysis in one of an acid aqueous solution or a neutral salt aqueous solution to remove smut. Further, a common DC power source is used for cathodic electrolytic treatment and for anodizing treatment. To prevent sparks, an AC current is partially shunted before use in cathodic electrolysis. Finally, an aluminum plate is first electrolytically treated as a cathode in a neutral salt electrolyte, and then is electrochemically surface-roughened in an acid aqueous solution.

REFERENCES:
patent: 3887447 (1975-06-01), Sheasby et al.
patent: 4166015 (1979-08-01), Raether
patent: 4332651 (1982-06-01), Bemis et al.
patent: 4482434 (1984-11-01), Pliefke
patent: 4482444 (1984-11-01), Frass et al.
patent: 4502925 (1985-03-01), Walls
patent: 4614570 (1986-09-01), Pliefke
patent: 4919774 (1990-04-01), Minato et al.

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