Wässrige Schreibtinte

摘要

There is provided aqueous ink of high viscosity for writing instrument, capable of maintaining stable dispersed or dissolved state of the coloring material even after a prolonged period and exhibiting high fluidity under a shearing force applied by the writing operation in the ball point pen. The ink contains, as essential components, a coloring material, succinoglycan which is an organic acid-modified heteropolysaccharide composed of glucose and galactose as component monosaccharides, and aqueous medium in which water constitutes at least 50 wt.%.