| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a water-based ink set for inkjet recording, in which pigment ink and dye ink are combinedly used and which has high reliability without complicating a maintenance system. <P>SOLUTION: The water-based ink set for inkjet recording comprises pigment ink having ≥60 ppm of the total of ion concentration of lithium ion, potassium ion and sodium ion and ≤10 ppm of the total of ion concentration of di- or polyvalent metal ion and dye ink having ≤1,800 ppm of the total of ion concentration of lithium ion, potassium ion and sodium ion, ≤10 ppm of the total of ion concentration of di- or polyvalent metal ion in which the total of ion concentration of lithium ion, potassium ion and sodium ion of the dye ink is 3-25 times the total of ion concentration of lithium ion, potassium ion and sodium ion of the pigment ion. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
