Patent ID: 8486185

Claim:
An inkjet recording ink comprising: water; a water-soluble organic solvent; a colorant; and at least one fluorochemical surfactant having a formula selected from the group consisting of (b), (a), (a′), and (h): [(RfSO 2 ) 2 ]N − M + (a), [(RfSO 2 )(RSO 2 )]N − M + (a′), [(FSO 2 ) 2 ]N − M + (h), wherein M + is Li + , Na + , K + , or NH 4 + , Rf is CF 3 , C 2 F 5 , C 3 F 7 , or C 4 F 9 , and R is a C1-C10 alkyl group.