fig1 is a perspective view showing an embodiment according to this invention , wherein an outer view of the detachable type ink jet printing head to be exchanged by the user and to be mounted on an ink jet printing device is indicated . in fig1 reference numeral 1 is a detachable type ink jet printing head , reference numeral 2 is an ink discharge outlet , reference numeral 3 is an ink supply inlet for supplying printing ink from the ink reservoir ( not shown ), reference numeral 4 is a filter for removing the dust of from the ink reservoir , reference numeral 5 is a panol for connection to the ink reservoir , reference numeral 6 is a packaging for enclosing ink jet printing head 1 , and reference numeral 7 is a gas charged into the closed space enclosed within said packaging 6 . during the period while said ink jet printing head 1 is not yet mounted on the printing device not shown in the drawing , the ink jet printing head is transported and stored under the condition that any liquid - like printing ink or preservation liquid or any solid to be charged for printing is not charged into both the inside of the printing head and the enclosed space packaged by the hermetically sealed material . also , at this time , the printing head is transported and stored under the condition that it is merely packaged by the packaging 6 , and with no sealing members like seals , caps and the like attached to ink discharge outlet 2 and ink supply inlet 3 . through the process shown in fig2 the ink jet printing head is packaged , transported and stored . an explanation is made as mentioned hereunder referring to fig2 . the printing character inspection of the produced ink jet printing head is made , on all products , to check for normal ink discharge . the printing head offered for printing character inspection is filled with printing ink as shown in step 1 ( s1 ), then brought to a printing character inspecting device as shown in step 2 ( s2 ) to execute printing character inspection . the printing head , of which any defect in ink discharge has been detected , is withdrawn in step 3 ( s3 ). on the other hand , the ink in the printing head , of which no defect in ink discharge has been detected , is removed by applying a suction device such as a vacuum pump and the like from the nozzle side of the printing head as shown in step 4 ( s4 ). in this embodiment , the removal of printing ink was conducted by applying a suction pump under the condition of 180 torr , 10 liter / min . for 3 and up to 5 seconds . then , the inside of the printing head was cleaned by using pure water or clear ink as shown in step 5 ( s5 ). this cleaning is to remove the coloring ingredients contained in the ink which is still remaining within the already sucked printing head . ( especially , when the coloring ingredient remains around the area of the electro - thermal conversion unit in the nozzle , and dries , the adherence the coloring ingredient takes place and scorching upon printing or defective printing is likely to happen .) cleaning of the printing head was conducted by applying a continuous flow of pure water or clear ink through the printing head . when bubble cleaning , that is to say , cleaning by mixing bubbles into the cleaning liquid , is applied , it will result in the increase of the cleaning effect and the saving of the cleaning time . cleaning was conducted by applying the suction pump mentioned in step 4 and by applying the flow of the cleaning liquid through the printing head under the condition of 180 torr , 10 liter / min . for 10 seconds . in the next step 6 ( s6 ), cleaning liquid was removed from the inside of the printing head under the condition of 180 torr , 10 liter / min , for 3 and up to 5 seconds . this step is incorporated because of its effectiveness to shorten the time of the vacuum drying in the next step . step 7 ( s7 ) is a process for removing the remaining cleaning liquid in the printing head by applying vacuum drying . by removing the cleaning liquid sufficiently , the unevenness of the printing quality among nozzle of to the printing head can be eliminated . by conducting vacuum drying , it becomes possible to maintain the printing quality of the head satisfactorily right after its mounting on the printing device even after a long period of transportation and storage of the printing head . the vacuum drying is conducted for about one hour by maintaining the inside of the vacuum drying device under the temperature from 45 degrees c . up to 55 degrees c . and under the pressure of approx . 10 torr . the pressure reducing speed does not affect the drying efficiency . at step 8 ( s8 ), the printing head , on which vacuum drying has been completed , is packaged as shown in fig1 . the packaging material for the printing head , on which the above - mentioned treatment has been completed , does not require a particular material for the less permeability of gas as there is not any residue of ink to give defective influence on the electro - thermal conversion unit and not any evaporating substance to oxidize the electrode . according to the present invention , with the above - mentioned steps applied prior to the transportation and storing , ink adhesion in the printing head caused by the the evaportation and drying of ink is avoided , and generation of the initial printing defect is prevented to ensure stable printing quality . moreover , the condition of a recovery operation for the stable initial printing quality can be lowered , resulting in less consumption of waste ink . moreover , according to the present invention , the conventional sealing materials such as seals and caps needed for enclosing the ink jet printing head 1 in which the ink or the preservation liquid is contained can be eliminated , resulting in the reduction of cost , and yet with no scattering of ink . when filling the closed space enclosed within the sealing packaging 6 with an inert gas 7 by the ratio substantially of not less than 80 %, it is possible to maintain the initial performance of the ink jet printing head 1 in good condition for a longer period of time . as mentioned above , the present invention provides a method for transporting and storing an ink jet printing head without any liquid and solid in the closed space , which is to be filled with printing ink upon use . as a consequence , there are provided such merits that the initial printing defect caused by the adhesion of printing ink is prevented by this invention , and the sealing material needed for preventing ink evaporation and ink leakage is eliminated , and in addition the scattering of the ink is prevented .