Reducing damaging effects of dissolution within an ink-jet printhead
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United States of America Patent
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Apr 23, 2013
Grant Date -
Oct 28, 2010
app pub date -
Sep 8, 2008
filing date -
Sep 12, 2007
priority date (Note) -
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Abstract
The present invention is drawn to systems and methods for suppressing damaging effects from dissolution of silica present in an ink-jet printhead which contains high pH, pigmented ink. The systems and methods suppress the damaging effects of dissolution of silica by the action of a basic ink by adding a metal ion to the ink composition which forms a complex with the silica. The metal ion passivates the silica thus retarding the dissolution of silica thereby reducing promotion of ink kogation, silicate ring formation, and silicate deposit on ink-jet printhead resistors which effectively improves durability and shelf life of the ink-jet printhead.
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