Invention Grant
US07988277B2 Ink set, ink jet recording method, ink cartridge, recording unit, ink jet recording method, and aqueous ink 有权
油墨组,喷墨记录方法,墨盒,记录单元,喷墨记录方法和水性油墨

Ink set, ink jet recording method, ink cartridge, recording unit, ink jet recording method, and aqueous ink
Abstract:
An ink set is provided which can suppress bleeding irrespective of the type of recording medium. The ink set includes a plurality of aqueous inks each containing a dye, and has at least a first aqueous ink containing a dye, wherein the difference between the dynamic surface tension of the first aqueous ink at a lifetime of 50 milliseconds and the dynamic surface tension of the first aqueous ink at a lifetime of 500 milliseconds is 7 mN/m or more; and, between the first aqueous ink and at least one type of aqueous ink except the first aqueous ink included in the ink set, dynamic surface tension γa (mN/m) of an ink A having relatively higher lightness at a lifetime of 500 milliseconds and dynamic surface tension γb (mN/m) of an ink B having relatively lower lightness at a lifetime of 500 milliseconds satisfy −5≦(γa−γb)≦3.
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