| 摘要 |
<p>PURPOSE:To obtain an aqueous ink being not extremely low in surface tension value and having good wetting property to hydrophobic pen lead surface by constituting the ink so as to fit in a direct liquid type writing tool having a structure capable of storing free ink (not in a cartridge) in a penholder drum and putting a pen lead consisting of a plastic material between pen point and an ink storing part. CONSTITUTION:This aqueous ink contains a coloring agent and a polyoxyethylenepolyoxytpropylene alkyl ether as a surfactant.</p> |
