| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve faults that ordinary marking pens of oily ink for steel materials are poor to erase a written image on Zn-Ni steel and organic coated steel (coated with an epoxy resin or an acrylic resin) and marking pens of aqueous ink can not be used to common steel and Zn-Ni steel plates. SOLUTION: This oily ink for use in steel materials comprises at least colorant, a resin, an organic solvent and a nonionic surface active agent, wherein the organic solvent is a mixture of xylene and an alcohol with a middle length chain, and the nonionic surface active agent is a poly(oxyethylene)sorbitan fatty acid ester.</p> |
