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AssigneeBrother Kogyo Kabushiki Kaisha
InventorsHitomi SADOHARA, Hiromitsu SAGO, Yuko IWAMURA, Akiko MIYAJIMA
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An evaluation method for evaluating a pigment ink for ink-jet recording used together with a dye ink and containing a pigment and water includes an aggregation property evaluation method for the pigment in which 10 parts by weight of an aqueous sodium chloride solution is added to 100 parts by weight of the pigment ink; the evaluation method including first aggregation property evaluation adding an X wt % aqueous sodium chloride solution; and second aggregation property evaluation adding a Y wt % aqueous sodium chloride solution; wherein concentrations of the aqueous sodium chloride solutions are set to fulfill the following condition in the first and second aggregation property evaluations: 1.0≦X<Y≦2.5. The optical density of a printed matter and the dispersion stability of the pigment when the pigment ink is brought in contact with the dye ink can be easily evaluated before the printing.
An evaluation method for evaluating a pigment ink for ink jet recording which is used together with a dye ink for ink jet recording and which contains a pigment and water, the method comprising:
An evaluation method for evaluating a pigment ink for ink jet recording which is used together with a dye ink for ink jet recording, the method comprising:
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