Recording ink
AssigneeBrother Kogyo Kabushiki Kaisha
InventorShunichi Higashiyama
Life of this patent
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Abstract
A recording ink includes water, a coloring agent and a water soluble co-solvent having a molecular weight of lower than 1,000. The recording ink has a viscosity at 25.degree. C. of higher than 5 cps.
Claims17
A recording ink comprising:
- water;
- at least one coloring agent;
- and
- a water soluble co-solvent selected from the group consisting of polyglycols, polyvinyl alcohol, polyvinyl pyrrolidone, methylcellulose and mixtures thereof having a molecular weight of lower than 1,000;
- wherein the recording ink has a viscosity greater than 5 cps at 25.degree. C.
A method of producing a printed image of high print quality comprising jetting a recording ink through an ink jet nozzle onto a recording medium, wherein said recording ink comprises water, at least one coloring agent, and a water soluble co-solvent selected from the group consisting of polyglycols, polyvinyl alcohol, polyvinyl pyrrolidone, methylcellulose and mixtures thereof having a molecular weight of lower than 1,000, wherein the recording ink has a viscosity higher than 5 cps at 25.degree. C.
A recording ink consisting essentially of:
- water;
- at least one coloring agent;
- and
- a water soluble co-solvent selected from the group consisting of ethylene glycol, triethylene glycol, propylene glycol, polyglycols, glycerin, polyvinyl alcohol, polyvinyl pyrrolidone, methylcellulose and mixtures thereof having a molecular weight of lower than 1,000;
- wherein the recording ink has a viscosity greater than 5 cps at 25.degree. C.
Dependencies are inferred from the claim text.