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    • 62. 发明授权
    • Aqueous ink, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus
    • 水性墨水,喷墨记录方法,墨盒,记录单元和喷墨记录装置
    • US07578876B2
    • 2009-08-25
    • US11853479
    • 2007-09-11
    • Yoshio NakajimaSadayuki SugamaShin-ichi Hakamada
    • Yoshio NakajimaSadayuki SugamaShin-ichi Hakamada
    • C09D11/02
    • C09D11/324
    • The invention provides an aqueous ink that can prevent clogging at an orifice due to drying of the ink though the ink contains a pigment, and can achieve high-level ejection stability required in recent years. The aqueous ink contains at least water, a water-soluble organic solvent and carbon black particles, the carbon black particles including carbon black particles having a particle size of 0.5 μm or more, wherein a proportion made up by the volume of carbon black particles having a particle size of 0.2 μm or more and less than 0.5 μm is 0.3% or less based on the total volume of all the carbon black particles in the ink, a number of carbon black particles having a particle size of 0.5 μm or more and less than 5.0 μm is 1.0×107 or less per mL of the aqueous ink, and an average particle size value of the carbon black particles is from 0.060 μm or more to 0.130 μm or less.
    • 本发明提供了一种水性油墨,其可以防止由于油墨含有颜料而导致的油墨干燥而导致的孔堵塞,并且可以实现近年来所需的高水平喷射稳定性。 水性油墨至少含有水,水溶性有机溶剂和炭黑粒子,炭黑粒子包含粒径为0.5μm以上的炭黑粒子,其中,由炭黑粒子的体积构成的比例具有 0.2μm以上且小于0.5μm的粒径相对于油墨中的全部炭黑粒子的总体积为0.3%以下,粒径为0.5μm以上的炭黑粒子数 相对于每毫升水性墨水,5.0μm以上1.0×10 7以下,碳黑粒子的平均粒径值为0.060μm以上0.130μm以下。