| abstract |
Provided is an ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula <CHEM> wherein R<1> and R<2> are respectively a radical selected from the group of lower alkyl, lower alkoxy, -NHCOCH3, -COOM, and -SO3M; R<3>, R<4>, and R<5> are respectively a radical selected from the group of hydrogen, hydroxyl, lower alkyl, lower alkoxy, amino, -SO3M, and -COOM; A is <CHEM> R<6> and R<7> are respectively a radical selected from the group of hydrogen, hydroxyl, and lower alkoxy; m is 1 or 2; n is 0 or 1; and M is alkali metal or ammonium. <IMAGE> |