Thomas Jason Huddleston
Engineers at Dos Rios, Greeley, CO
License number
Colorado 12804
Issued Date
Sep 21, 1974
Renew Date
Nov 30, 1994
Expiration Date
Nov 30, 1994
Type
Professional Engineer
Address
Address
23 Dos Rios, Greeley, CO 80634
Professional information
Bilayered Anodized Aluminum Support, Method For The Preparation Thereof And Lithographic Printing Plate Containing Same
US Patent:
4865951, Sep 12, 1989
Filed:
Oct 22, 1987
Appl. No.:
7/112182
Inventors:
Thomas J. Huddleston - Greeley CO
William P. Smith - Windsor CO
Gary R. Miller - Fort Collins CO
William P. Smith - Windsor CO
Gary R. Miller - Fort Collins CO
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
C25D 1112, B41N 108
US Classification:
430278
Abstract:
An anodized aluminum support for use in a lithographic printing plate comprises a bilayered anodic surface having a total average thickness of at least 0. 10 micrometers consisting essentially of oxides and phosphates of aluminum present in a coverage of greater than 100 milligrams per square meter of support. The anodic surface comprises an upper stratum comprising pores having an average diameter of 1. times. 10. sup. -8 -7. 5. times. 10. sup. -8 m and a lower stratum comprising pores having an average diameter substantially greater than the pores in the upper stratum. The support is prepared by a two-stage process of anodically oxidizing at least one surface of an aluminium plate in an aqueous electrolyte comprising phosphoric acid under conditions wherein the upper stratum is formed in the first stage and the lower stratum is formed in the second stage. A lithographic printing plate comprising a radiation-sensitive layer and the above-described support exhibits improved resistance to staining.