weight of the ink composition according to the present invention in order to obtain sufficient coloring performance of the dye as a colorant and to avoid the precipitation of the dye during an extended period of continuous use and storage or during the periods when the ink jet printing apparatus is not in use thereby preventing the plugging of the nozzles with the precipitates specific examples of the dyes represented by the formula i for use in the present invention are as follows the above dyes can be synthesized without difficulty for example dye no 12 can be synthesized by subjecting n n 39 bis 4 aminobenzoyl p phenylenediamine to tetera azotization by a conventional method followed by coupling the tetra azo product with n p toluenesulfonyl h acid in mildly alkaline solution in the present invention water is used as a base solvent of the ink composition for the purpose of adjusting the physical properties of the ink composition so as to have the desired properties to control the drying speed of the ink composition and to increase the solubility of the dye employed in the solvent of the ink composition the following water soluble organic solvents humectants can be.