| abstract |
An ink and an ink jet recording method capable of recording with high image density and high character quality on plain paper are provided. A self-dispersing pigment in which an anionic functional group represented by phosphonic acid, an alkali metal salt of phosphonic acid, or an ammonium salt of phosphonic acid is bonded to the surface directly or through another atomic group, and ammonium of an organic carboxylic acid For inkjet recording, comprising a salt, water, and a water-soluble compound having a hydrophilicity / hydrophobicity coefficient of 0.26 or more defined by the following formula (A), and having a surface tension of 34 mN / m or less ink. Formula (A) [Selection figure] None |