Back to results
US 4,070,969 AGranted
Method for strengthening lithographic printing plate images
AssigneeMinnesota Mining and Manufacturing Company
InventorJack R. Helmer
Life of this patent
Estimating the term…
Abstract
Aluminum based lithographic printing plates are treated with triethanolamine titanate and heat to impart added solvent resistance and strength to non-crosslinked ink-receptive image areas, thereby affording an increase in press life.
Claims2
A process of strengthening lithographic plates comprising:
- a. providing an exposed and developed olephilic image aluminum-based lithographic printing plate containing non-crosslinked resinous image areas thereon and hydrophilic non-image areas;
- b. preserving the hydrophilic non-image areas and strengthening the image areas by applying a solution of triethanolamine titanate;
- and
- c. heating the solution coated plate.
1 more element
Dependencies are inferred from the claim text.