Aqueous ink jet inks for use with commercial offset media and offset ink
AssigneeHewlett-Packard Company
InventorsShunqiong Yue, George M. Sarkisian
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Abstract
The present invention is directed to aqueous based ink compositions for ink jet printing on offset media and offset ink comprising combinations of dye-based and pigment-based colorants, and optionally surfactants. Optionally solvents and binders can be also added. In another formulation, an effective amount of the combination of ink colorants, at least one surfactant, being present at from about 0.1% to 1.5% by weight and an effective amount of at least one binder (such as an acrylate binder) is disclosed.
Claims28
An aqueous offset ink composition comprising:
- a) from about 0. 1% to about 5% of a dye-based colorant;
- and
- b) from about 0.5% to about 5% of a pigment based colorant;
- wherein said ink composition is used for printing on offset media.
A method of offset inkjet printing wherein an ink composition comprising a combination of pigment and dye colorants is printed onto offset media.
The method 10 further comprising a water soluble or water dispersible polymeric binder being present at from about 0.01% to 10% by weight.
A printer system comprising an offset ink containing
- i) from about 0.1% to about 5% of a dyebased colorant;
- and
- ii) from about 0.5% to about 5% of a pigment-based colorant;
- an inkjet printer;
- and offset media;
- wherein said printer used for printing the offset ink onto the offset media.
Dependencies are inferred from the claim text.