Ink for ink jet printing
AssigneeMarkem Corporation
InventorRichard J. Larson, Jr.
Life of this patent
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Abstract
A printing process includes printing a liquid ink onto a substrate surface. The ink includes a vehicle and a colorant dissolved in the ink. When the ink solidifies on the substrate the colorant, which is substantially insoluble in the solidified ink, migrates and locks to the surface to provide a substantially permanent readable color to the surface.
Claims26
A hot melt jet ink printing process, comprising
- ejecting a liquid ink onto a nonporous surface, said ink adsorbing onto said nonporous surface and solidifying as it cools,
- said ink comprising a non-polar vehicle and an oil-soluble dye that is substantially soluble in said vehicle when said ink is liquified but is substantially insoluble in said vehicle when said ink has solidified,
- said oil-soluble dye migrating and locking to said nonporous surface to provide a substantially permanent readable color to said nonporous surface.
A hot melt ink composition that is solid at ambient temperature but melts at an elevated temperature, said hot melt ink composition being suitable for use in ink jet printing, said ink composition comprising a non-polar vehicle and an oil-soluble dye that is substantially soluble in said vehicle at said elevated condition but is relatively insoluble in said vehicle at ambient conditions, wherein said dye, if said ink composition is ejected as droplets onto a polypropylene film with a polyamide surface, migrates and locks to said polypropylene film with a polyamide surface to provide a substantially permanent readable color.
A printing process, comprising
- printing a liquid ink onto a nonporous surface, said liquid ink adsorbing onto said nonporous surface, said ink comprising a non-polar vehicle and an oil-soluble anthraquinone dye, said dye being substantially dissolved in said liquid ink, and
- solidifying said ink on said nonporous surface, said dye being relatively insoluble in said solidified ink, said dye migrating and locking to said nonporous surface to provide a substantially permanent readable color.
A method for marking coded characters on a surface of a packaging material used in packaging a product or onto a surface of a product, comprising
- printing a liquid ink onto said surface in the form of coded characters, said ink comprising a non-polar vehicle and an oil-soluble dye, said dye being substantially dissolved in said liquid ink,
- adsorbing and solidifying said ink on said surface, said dye being relatively insoluble in said solidified ink, said dye locking to said surface and providing a substantially permanent readable color corresponding to said coded characters on said surface.
Dependencies are inferred from the claim text.