a pigment - based ink composition including a colorant , a cyclic amide represented by the formula : wherein r is at least one of ch 3 , c 2 h 5 , c 3 h 9 , c 4 h 9 , c 5 h 11 , c 6 h 13 , c 7 h 15 , and c 8 h 17 , and together with the n atom to which it is attached forms a 5 member ring ; an organic solvent ; an amine ; a biocide ; first and second surfactants ; and water . the ink is utilized in inkjet printing , it does not include resins or polymers , and it provides substantially permanent images on both porous and nonporous substrates .