| abstract |
To provide an ink-jet ink excellent in image density, ejection stability and maintenance stability and related technology. (1) An inkjet ink containing at least a pigment, a Gemini type dispersant, and water. (2) The inkjet ink according to (1), wherein the gemini-type dispersant is a sodium salt of a condensate of N-lauroyl-L-glutamic acid and L-lysine. (3) The inkjet ink according to (2), wherein the pigment is carbon black. (4) The inkjet ink according to (3), wherein the carbon black has an average primary particle diameter of 10 to 30 nm and a BET specific surface area of 100 to 400 m 2 / g. (5) The average particle size (D50) of carbon black in the particle size measurement by dynamic light scattering method is 70 to 180 nm, and the particle size standard deviation in the particle size distribution of the carbon black is 1 of the average particle size. The ink for inkjet according to (3) or (4), which is / 2 or less. [Selection figure] None |