2 methyl 2 4 pentanediol 1 2 6 hexanetriol and thiodiglycol 6 lower alkyl mono or di ethers derived from alkylene glycols such as ethylene glycol mono methyl or ethyl ether diethylene glycol mono methyl or ethyl ether propylene glycol mono methyl or ethyl ether triethylene glycol mono methyl or ethyl ether and diethylene glycol di methyl or ethyl ether 7 nitrogen containing cyclic compounds such as pyrrolidone n methyl 2 pyrrolidone and 1 3 dimethyl 2 imidazolidinone and 8 sulfur containing compounds such as dimethyl sulfoxide and tetramethylene sulfone particularly useful solvents are selected from the group consisting of methyl alcohol ethyl alcohol n propyl alcohol iso propyl alcohol n butyl alcohol iso butyl alcohol sec butyl alcohol ethylene glycol diethylene glycol propylene gylcol dipropylene glycol 1 5 pentanediol thiodiglycol 2 ethyl 2 hydroxymethylpropane 1 3 diol 2 pyrrolidone n methyl 2 pyrrolidone and mixtures of two or more of such solvents in general it is desirable to make the pigmented ink jet ink in the form of a concentrated mill grind which is subsequently diluted to the appropriate concentration for use in the ink jet printing system this technique permits preparation of a greater quantity of pigmented ink from the equipment if the mill grind was made in a solvent it is diluted with water and optionally other solvents to the appropriate concentration if it was made in water it is diluted with either additional water or water miscible solvents to make a mill grind of the desired concentration by dilution the ink is adjusted to the desired viscosity color hue saturation density and print area coverage for the particular application in the case of organic pigments the ink may contain up to approximately 30 pigment by weight.