| 摘要 |
PROBLEM TO BE SOLVED: To provide a print density improvement method that uses an ink composition comprising a xanthene compound, or an inkjet recording method using the ink composition.SOLUTION: The present invention provides a print density improvement method that uses an ink composition comprising a compound represented by formula (1) or a salt thereof, or a mixture of them as a colorant (Ris H or an unsubstituted alkyl group; R-Rindependently represent H, a carboxy group, or an alkyl group that may have a substituent such as a halogen atom and an alkoxy group; where at least one of R-Ris a carboxy group).SELECTED DRAWING: None |
