| abstract |
Impulse ink jet compositions are provided which are suitable for printingnclear, well-defined alphanumeric text or low spread, narrow bar width bar codes on porousnsubstrates such as Kraft paper or corrugated cardboard. The ink compositions preferablyncomprise from about 20 to 50 percent by weight of a carbon black dispersion, from aboutn10 to 20 percent by weight of a dispersion medium, from about 40 to 60 percent by weightnof a plasticizer and less than 2% of an antioxidant additive. The antioxidant additivenlowers the dissolved oxygen level in the ink, thereby enhancing the jetting performance ofnthe printhead. |