Halftone printing of metal-pigmented inks to produce various metallic appearances
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United States of America Patent
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Apr 28, 2015
Grant Date -
Feb 9, 2012
app pub date -
Sep 4, 2009
filing date -
Sep 4, 2008
priority date (Note) -
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Abstract
A system and method for producing a wide range of metallic appearances using halftones of a nano-particle metallic ink, such as, for example, nano-silver, are presented. In exemplary embodiments of the present invention, a nano-particle metallic ink, such as, for example, nano-silver, can be made to produce a range of appearances from, for example, bright silver to dull oxidized aluminum, by changing halftone level of the silver inks, changing the substrate surface properties and introducing small amounts of other colored inks, such as process or spot, in either an underprinting or overprinting of the metallic ink. In exemplary embodiments of the present invention, InkJet printing of a single metal-pigmented ink can be effected, and its metallic appearance can very quickly be adjusted to match a given package design.
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