Lithographic substrates
US4242417A · kind A · utility
9Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1979 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | Aug 24, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises mechanically graining the surface of an aluminum sheet, subsequently finely graining the mechanically grained sheet in a saturated solution of an aluminum salt of a mineral acid to which up to 10% of a mineral acid has been added, with discretional electrolysis, and then optionally anodizing the sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.