| 摘要 |
Provided is an aqueous solution and an ink composition having a favorable color as black ink, providing a colored image or a colored material having excellent fastness by removing a change in image quality of a record by a difference in recording paper, and providing stable ink having a small change in physical properties, particularly, suppressed bronze gloss, even though preservation is performed over a long period of time. In addition, there is provided a method of forming an image, which provides ink for printing or recording, such as inkjet, and prevents a reduction in image quality of the formed image (a method of preventing a reduction in image quality). An aqueous solution including: (a) a preservative, and (b) at least one kind of an azo compound represented by the following Formula (1) or a salt thereof, wherein a content of (b) is 1% by mass to 25% by mass:
wherein, in Formula (1), A represents a substituted phenyl group or a substituted or unsubstituted nitrogen-containing 5-membered heterocyclic group, G represents a nitrogen atom or -C(R 2 )=, R 2 represents a hydrogen atom, a sulfo group, a carboxy group, a substituted or unsubstituted carbamoyl group or cyano group, Y 2 , Y 3 and Y 4 each independently represents a hydrogen atom or a monovalent substituent, Y 2 , Y 3 and Y 4 may be bonded to each other to form a ring, all of Y 2 , Y 3 and Y 4 do not represent a hydrogen atom at the same time, and M each independently represents a hydrogen atom or a monovalent countercation. |
