| abstract |
The present invention provides an ink jet image forming method in which instability of ink ejection from a head due to cavitation that occurs during ink supply, and image defects and density reduction due thereto are improved. SOLUTION: A water-based dye, ion-exchanged water, and an organic solvent are contained, the surface tension is 45 mN / m or more, and the content of solid fine particles is reduced by a particle counter after filtration through a filtration material having a filtration accuracy of 0.5 μm. Ink that is water-based dye ink, which is 10000 (pieces / 10 ml) or less of 0.5 μm or more, is once transferred from the ink container to the storage tank 1 and pumped up by the liquid feed pump 3, and the ink is used as it is or Then, after filtering with a filtration material having a filtration accuracy of 0.5 μm, the solid fine particles are supplied to the inkjet head 8 through the deaeration device 5 and discharged to the printing medium 9 in a state where the solid fine particles are 10000 (pieces / 10 ml) or less. Thus, an image is formed on the print medium. [Selection] Figure 1 |