| 摘要 |
<p>A cyan ink comprising a phthalocyanine derivative represented by the following formula (I), excellent in color reproducibility, suitable for use in the ink jet recording method is disclosed. The combination use of this cyan ink comprising the phthalocyanine derivative with yellow and magenta inks, each comprising a specific dye, gives excellent color printing. <CHEM> wherein X represents an ion of a metal selected from Cu, Fe, Co and Ni, R<1> represents H or an alkyl group, Z represents -OH, -COOH or NR<2>R<3> (where R<2> represents H or an alkyl group, and R<3> represents an alkyl group or phenyl group), n represents an integer of 1 to 15, k and l represent 0 or 1, and m represents an integer of 1 to 4, provided that k, l and m fulfill the inequality 2 </= k + l + m </= 4.</p> |
