| http://www.w3.org/ns/prov#value | - in such an amount that the surface tension of the aqueous ink composition is 50 mN/m or less; or a compound of formula (X): ##STR11## wherein m and n each is an integer of 0 to 40, which surfactant is added in such an amount that the surface tension of the aqueous ink composition is 50 mN/m or less.
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