| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a marking ink composition for a metal surface with an attached oil, which forms clear images (character, sign, etc.) on the surface of metal component with an oil such as mineral oil, attached thereto in which the images are not easily peeled by scratch or various cleaning liquids in a production step in the metal processing field. <P>SOLUTION: The oily ink composition comprises at least one or more solvents A selected from alcohols, glycol ethers and esters, a solvent B being a dialkyl carbonate, a colorant and a polyvinyl butyral resin. The polyvinyl butyral resin has physical property ranges of a polymerization degree of 200-700, a butyralization degree of 60-70% and an intramolecular hydroxy group ratio of 30-40%. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
