Method for producing supports for lithographic printing plates

Details Method for producing supports for lithographic printing plates Method for producing supports for lithographic printing plates

1984-06-11

1985-12-31

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

20412935, 2041294, 20412975, 204DIG9, 20412943, C25D 544, C25F 304

Patent

active

045619441

ABSTRACT:
A method for producing a support for a lithographic printing plate is described, which comprises mechanically graining the surface of an aluminum sheet, and then electrolytically graining the surface of the aluminum sheet in a solution containing hydrochloric acid, nitric acid, or a mixture thereof by applying thereto an alternating current in such manner that the ratio the quantity of electricity during the cathodic period to the quantity of electricity anodic period is in the range of from 1.0/1 to 2.5/1.

REFERENCES:
patent: 3193485 (1965-07-01), Vincent
patent: 4229266 (1980-10-01), Usbeck
patent: 4272342 (1981-06-01), Oda et al.
patent: 4294672 (1981-10-01), Ohba et al.
patent: 4297184 (1981-10-01), Dyer

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