| 摘要 |
<p>PURPOSE:The titled black recording solution, containing a specific compound and a violet acid dye, and capable of giving recorded images of high density having improved water, light and abrasion resistance without clogging nozzles. CONSTITUTION:A recording solution containing at least one compound of formula I , II or III [M is alkali metal, NR1R2R3R4 (R1-R4 are H, aliphatic or aromatic hydrocarbon) or a nitrogen-containing heterocyclic group] (the compound of formula I is the main component of C.I. Direct Black 19, and the compound of formula II is known as a by-product in the C.I. Direct Black 19), and a violet acid dye, e.g. C.I. Acid Violet 15, preferably at (1:0.03)-(1:0.6) weight ratio. EFFECT:The jetting is carried out stably without depositing solids even on storage for a long term.</p> |
