Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1977-04-13
1978-02-07
Mack, John H.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
20412975, C25F 304, C25F 500
Patent
active
040725898
ABSTRACT:
A method for electrolytically graining the surface of aluminum sheets useful in the production of lithographic printing plates which comprises subjecting said aluminum sheets to the action of alternating electric current in an aqueous electrolytic solution containing, in combination, small but effective amounts of both hydrochloric and nitric acids.
REFERENCES:
patent: 3887447 (1975-06-01), Sheasby et al.
patent: 3980539 (1976-09-01), Lloyd et al.
Chu Simon L.
Golda Eugene
Huang Jen-chi
Shimazu Ken-ichi
Mack John H.
Polychrome Corporation
Valentine D. R.
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