US 6,648,463 B2 · Water base ink for ink-jet recording

Abstract

A water base ink for ink-jet recording comprises water, a coloring agent, a water-soluble organic solvent, and a benzotriazole-based metal-inactivating agent and alkanolamine. When the ink is used in an ink-jet recording apparatus which has the metal member containing nickel or nickel alloy in an ink supply passage, nickel is eluted from the metal member in an amount of not more than 50 ppm. The ink makes it possible to perform stable jetting operation for a long term without causing any deterioration of metal members of a discharge head due to the metallic corrosion and the elution of nickel into the ink.

Claims6

Dependent claims

An ink-jet printer, comprising:

an ink-jet head which has at least a part of ink flow passage formed of nickel or nickel alloy;
ink which contains at least one of benzotriazole-based metal-inactivating agent and alkanolamine so that the total amount of the benzotriazole based metal-inactivating agent and the alkanolamine is from 0.1% to 0.4% by weight of the weight of the ink;
and
an ink tank which accommodates the ink and which supplies the ink to the ink-jet head, wherein nickel is eluted in an amount of not more than 50 ppm from the ink-jet head to the ink.

1 more element

Dependencies are inferred from the claim text.

Water base ink for ink-jet recording

Life of this patent

Water base ink for ink-jet recording

Life of this patent

Abstract

Claims6