UNDILUTED INK SOLUTION FOR INKJET RECORDING

摘要

PROBLEM TO BE SOLVED: To provide a stable undiluted ink solution hardly forming a dye solid even after passing a period from the preparation of the undiluted ink solution.

SOLUTION: The undiluted ink solution for inkjet recording is obtained by dissolving or dispersing at least an azo dye having a specific structure and a component containing a surfactant in a medium. The azo dye having the specific structure is obtained by using an aromatic-containing nitrogen heterocycle as a coupling component, and the surfactant is a betaine-type surfactant. The undiluted ink solution for the inkjet printing has excellent solution stability even after a long-term preservation.

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