| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink jet head in which a nozzle surface is formed of an ink repellent substance, thereby exerting full water repellent characteristics and lessening a film reduction by wiping and which is coated with a substance not to easy to release from the nozzle surface. SOLUTION: The nozzle surface is coated with a triazine thiol derivative having a wafer repellency function. Particularly the triazine thiol derivative substituted with an alkyl group containing fluorine is preferred.
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