Ink, ink cartridge, and ink jet recording method
AssigneeCanon Kabushiki Kaisha
InventorsYasuhito Mori, Shinichi Hakamada, Tomohiro Yamashita
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Abstract
Provided is an ink jet ink including a monoazo pigment and a resin, the ink being used for an ink jet recording system in which the ink is ejected from a recording head by an action of thermal energy. The monoazo pigment is a self-dispersible pigment having an anionic group bonded to a particle surface of the pigment directly or via another atomic group and has a surface charge amount of 5.9×10−2 mmol/g or more and 9.8×10−2 mmol/g or less. The resin has an acid value of 100 mg KOH/g or more and 160 mg KOH/g or less. The mass ratio of the content (mass %) of the resin to the content (mass %) of the monoazo pigment in the ink is 0.05 times or more and 0.25 times or less.
Claims7
An ink jet ink, being used for an ink jet recording system in which the ink is ejected from a recording head by an action of thermal energy, comprising a monoazo pigment and a resin, wherein:
- the monoazo pigment comprises a self-dispersible pigment having an anionic group bonded to a particle surface of the pigment directly or via another atomic group and has a surface charge amount of 5.9×10−2 mmol/g or more and 9.8×10−2 mmol/g or less;
- the resin has an acid value of 100 mg KOH/g or more and 160 mg KOH/g or less;
- and
- a mass ratio of a content (mass %) of the resin to a content (mass %) of the monoazo pigment in the ink is 0.05 times or more and 0.25 times or less.
Dependencies are inferred from the claim text.