| http://www.w3.org/ns/prov#value | - Therefore, to cope with a case when ink becomes inadequate for jetting or recording due to such cause as intrusion of air bubbles or dust inwardly from such discharging orifices or viscosity increase of ink resulting from evaporation of ink solvent, it is a practice to flush the ink to remove these causes of defective jetting or discharging of ink (the process being referred to as jetting recoveri
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