The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 1989
Filed:
Oct. 30, 1987
Michael Brenk, Wiesbaden, DE;
Renate Ernst, Wiesbaden, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
There is disclosed a plate-, foil- or web-shaped support material for offset printing plates, made of mill-finished, mechanically and/or chemically or mechanically and electrochemically grained aluminum or an aluminum alloy, which has been anodized in aqueous-alkaline solutions. The support material of the invention shows a reflectometer value, at an angle of incidence of 60.degree. (measured according to DIN 67 530; 1982), of greater than 5, an abrasion of the oxide layer of less than 0.5 g/m.sup.2 and a resistance to alkali of greater than 140 s. Also disclosed is a process for the manufacture of the support material, in which an anodic oxidation is carried out in an electrolyte having a pH greater than or equal to 12.5, at a voltage of less than 50 V.