| http://www.w3.org/ns/prov#value | - ink, JOP 11-80639 discloses a combination technique in which an ink including a carbon black on which a hydrophilic group is grafted by a physical or chemical treatment, and one of acetylene glycol to which ethylene oxide or propylene oxide is added, polyoxyethylene alkyl ether or polyoxyethylene polyoxypropylene alkyl ether is used for a recording method in which a piezoelectric element is moved
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