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US 10,851,256 B2Granted
Inkjet printing method and inkjet printing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsRyuki Nanamiya, Yukako Tamanuki, Takashi Saito, Hiroshi Kakikawa, Kazuya Nushiro
Life of this patent
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Abstract
An inkjet printing method for printing an image by using a cyan ink, a magenta ink, and a blue ink, including the step of applying the blue ink to a region provided with both the cyan ink and the magenta ink.
Claims5
An inkjet printing method for printing an image on a printing medium by ejecting each of a cyan ink, a magenta ink, and a blue ink from a printing head, comprising the step of:
- applying the blue ink to a region provided with both the cyan ink and the magenta ink,
- wherein a color material for the cyan ink comprises a compound having a phthalocyanine skeleton,
- a color material for the magenta ink comprises a compound denoted by a general formula (1) described below,
- the blue ink comprises a color material and a water-soluble organic solvent,
- the water-soluble organic solvent comprises a first water-soluble organic solvent having a Log P value of −1.10 or more,
- the content (percent by mass) of the first water-soluble organic solvent is 1.0 times or more to 16.5 times or less the content (percent by mass) of the compound denoted by the general formula (1) in the magenta ink on a mass ratio basis, and
- the hue angle of the blue ink is between the hue angle of the cyan ink and the hue angle of the magenta ink,
- (in the general formula (1), each of R1, R2, R3, and R4 represents a hydrogen atom, an alkyl group, or an aryl group, each Z represents a sulfonic acid group or a sulfamoyl group, n represents an integer of 0 or more to 3 or less, and Z is a substituent at the position of at least one of hydrogen atoms of aromatic rings in the general formula (1) when Z is present).
5 more elements
Dependencies are inferred from the claim text.