NOVEL AZO COMPOUND, AQUEOUS SOLUTION, INK COMPOSITION, INK FOR INKJET RECORDING, INKJET RECORDING METHOD, INK CARTRIDGE FOR INKJET RECORDING AND INKJET RECORDED ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide an aqueous solution capable of providing an ink having good color tone as a black color ink, high print density, and excellent in suppressing bronze brightness on recording images when using various recorded materials.SOLUTION: There is provided an aqueous solution containing a preservative agent, a specific azo compound or a salt thereof (for example the following compound or a salt thereof) of 1 mass% to 25 mass%.