| abstract |
To achieve both printing quality and ink ejection reliability. SOLUTION: At least a coloring material, a water-soluble solvent, and an alkyl alcohol having 4 to 6 carbon atoms are contained in the ink composition in the range of 0.05% by weight to 0.5% by weight. In a preferred embodiment, the water-soluble solvent is 1,2-alkanediol or glycerin, more preferably 1,2-alkanediol is 1,2-hexanediol. Preferably, the alkyl alcohol having 4 to 6 carbon atoms is n-alkyl alcohol, and more preferably n-hexanol is 1-hexanol. [Selection figure] None |