| 摘要 |
PURPOSE:A black recording liquid, containing C.I. Food Black 2 and a specific dye, e.g. C.I. Acid Black 7, etc. together as water-soluble dyes, and having improved solubility and solution stability for a long term without causing clogging of extrusion orifices. CONSTITUTION:An aqueous recording liquid containing (A) C.I. Food Black 2 and (B) one or more of the group of C.I. Acid Black 7, C.I. Acid Black 9, C.I. Acid Black 48, C.I. Acid Black 64, C.I. Acid Black 109, C.I. Acid Black 110, C.I. Acid Black 187, C.I. Acid Black 208, C.I. Direct Black 62, C.I. Direct Black 113 and C.I. Direct Black 154 in preferably (100:1)-(1:1) ratio together as water- soluble dyes as a recording agent. |
