| http://www.w3.org/ns/prov#value | - However, the water-soluble thickener which includes, for example, a cellulose derivative such as hydroxylpropyl cellulose, carboxylmethyl cellulose, hydroxylethyl cellulose, methyl cellulose or the like, or polyvinyl alcohol tends to change a viscosity of the ink composition or, in some cases, to produce precipitates during storage in combination with a water-soluble dye or coloring agent.
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