| 摘要 |
<p>PURPOSE:A black recording solution suitable for ink jet recording, having improved recording characteristics, shelf stability, grab to materials to be recorded, light resistance and water resistance of recorded image, etc., containing a novel naphthalene disazo dye having a specific structural formula. CONSTITUTION:The desired recording solution containing preferably 0.1-20wt% black dye (e.g., compound shown by the formula II, etc.) shown by the formula I [X is 1-4C alkylcarbonylamino, arylcarbonylamino, 1-4C alkylsulfonylamino, arylsulfonylamino, (substituted) carbonamide, (substituted) sulfonamide, -SO3M (M is alkali metal, ammonium, etc.); R<1> is H, 1-8C alkyl, 2-8C alkylcarbonyl, 1-4C alkylsulfonyl, arylsulfonyl, etc.; R<2> is H, 1-8C alkyl; n is 0 or 1] as a recording agent. EFFECT:Affords no clogging of extruding orifice.</p> |
