views of the print head 7 seen from the opening 9 side the opening is not required to be rectangular when each of the uv light sources is arranged around the opening and is then adjusted to emit the uv light focused onto the flying path and the landed position vicinity of the ink discharged from the opening its position can be appropriately adjusted according to the position of the opening and the shape of the head plural uv light sources each having a wavelength curing the ink or a wavelength for modifying the printed substrate can be mixedly arranged by modifying the printed substrate the degree of contact of the printing object can be increased to improve the visibility in addition plural light emission sources each having a led or an optical fiber may be mixedly arranged fig7 shows an example of the landed position vicinity fig7 is a top view of the printed substrate seen from the head side in which the position to cover printing objects 21 is a landed position vicinity 20 the uv light is preferably focused onto the inside of the substantial printing objects 21 region at maximum light intensity fig8 is a block diagram showing the configuration of this embodiment first the overview of the configuration of a control unit will be described the reference numeral 22 denotes an mpu microprocessing unit which controls the entire ink jet recording apparatus the reference numeral 23 denotes a rom read only memory which stores a control program and data necessary for operating the mpu the reference numeral 24 denotes a ram rewritable memory which temporarily stores data necessary during program execution the reference numeral 25 denotes a.