Ink, ink set, ink cartridge, recording unit, image recording method and image recording apparatus

摘要

The purpose is to provide such ink hardly as to affect an exothermic heater on a change in ink jet performance when used for a long-time ink jet recording according to the way to eject an ink by using an exothermic heater. The ink contains at least one substance selected from dicarboxylic acids, dicarboxylates, tricarboxylic acids and tricarboxylates, bis-hydroxyethyl sulfone, and a water-soluble coloring material in an aqueous medium.