USE OF WATER SOLUBLE MULTIVALENT METAL SALTS FOR THE IMPROVEMENT OF IMAGE QUALITY ON PLAIN PAPERS
Original Publication Date: 1997-Dec-31
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
The incorporation of multivalent metal salts into receiver sheets and ink compositions is known. It is proposed herein to deposit water soluble multivalent metal salts onto papers by methods such as ink jet printing (including continuous stream, piezoelectric, thermal ink jet, and other drop-on-demand ink jet methods), lithographic printing, flex0 printing, or the like in an image pattern prior to printing on the paper with an aqueous ink. For example, the salt solution can be contained in a separate customer replaceable unit comprising a printhead and an ink cartridge for use in a thermal ink jet printer. Or, a cartridge can comprise a partitioned printhead separately connected to different colored ink supplies as well as a supply of the salt solution.