| 摘要 |
PURPOSE:A black recording solution having high oong-term dissolution stability, slightly causing clogging of jet orifice, having small change in color tone caused by kind of paper, containing two or more water-soluble dyestuffs under a specific condition. CONSTITUTION:The aimed recording solution containing two or more of (A) a water-soluble dyestuff satisfying a condition shown by the formula I [a* and b* are perception color index number in the space CIE1976 (L*, a*, b*; i is n-th dyestuff in dyestuffs used together; n is >=2] and (B) a water-soluble dyestuff satisfying a condition shown by the formula II. |
