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AssigneeBrother Kogyo Kabushiki Kaisha
InventorsJunichiro Sugimoto, Masashi Tsuda, Ryuji Kato, Narumi Koga, Masaya Fujioka, Shunichi Higashiyama
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A water-based ink for ink-jet recording and an ink-jet recording method allow the formation of sharp text and lines in high density black, and the formation of a high quality gradation image in which the graininess is reduced in a black image of a medium lightness to a high lightness (e.g., an achromatic image in dark gray to light gray) in ink-jet recording. The water-based ink combination for ink-jet recording comprises a black ink, and a color ink (A) and a color ink (B) that satisfy a color relationship of the following expression (I): about 120°≦|α−β|≦about 240° (I) wherein α is the hue angle of the color ink (A) and β is the hue angle of the color ink (B).
A water-based ink combination for ink-jet recording comprising a black ink, and a color ink (A) and a color ink (B) that satisfy a color relationship of the following expression (I):
A water-based ink set for ink-jet recording comprising a black ink, and a color ink (A) and a color ink (B) that satisfy a color relationship of the following expression (I):
An ink-jet recording method for forming a black image of a medium lightness to a high lightness comprising printing the image by overprinting a water-based color ink (A) and a water-based color ink (B), wherein the color ink (A) and the color ink (B) satisfy a color relationship of the following expression (I):
An ink-jet recording apparatus comprising ink cartridge receivers for receiving designated ink cartridges and nozzles for application of the inks to a recording material, wherein the cartridge receivers receive at least one black ink cartridge, at least one color ink (A) cartridge and at least one color ink (B) cartridge, wherein the color ink (A) and the color ink (B) satisfy a color relationship of the following expression (I):
Water-based ink cartridges for ink-jet recording comprising a black ink cartridge containing black ink, and a color ink (A) cartridge containing the color ink (A) and a color ink (B) cartridge containing the color ink (B) that satisfy a color relationship of the following expression (I):
Dependencies are inferred from the claim text.