| 摘要 |
<p>PURPOSE:To prepare the subject ink which has such excellent charactristics that it is highly safe and hygienic, has stable qualities, is free from strike through, and does not need a step to remove coarse particles, e.g. an excess filtration step, because a natural product, e. g. gilsonite, is not used as a dispersant in its production. CONSTITUTION:This ink contains a mineral oil contg. 1% or lower arom. hydrocarbon as the main vehicle, a carbon black as a pigment, a succinimide-based surfactant as a dispersant of the carbon black, and a petroleum resin sol. in the mineral oil.</p> |
