| abstract |
(57) [Summary] [Problem] To cope with various performances such as high optical density, image quality, image fastness, etc., and to prevent bleeding and white haze in black images and characters using black ink in the coexistence of color ink. Provided are a recording unit and an image recording apparatus having, in a liquid flow path, a configuration suitable for an ink set that can save ink consumption. The ink set includes a black ink and a color ink, wherein the black ink includes a salt, an aqueous medium, and a coloring material dispersed in the aqueous medium by the action of an ionic group. One color is used as an ink-jet head to apply an ink set whose composition is adjusted so as to destabilize the dispersion stability of the color material in the black ink when mixed with the black ink, and the cavitation resistance on the heating element is reduced. As a membrane, An ink jet head is used in which the portion in contact with the ink is a film containing Ta, and the lower layer is an amorphous alloy film containing Ta. |