| 摘要 |
PROBLEM TO BE SOLVED: To make high-quality printing possible for a printing method wherewith ink drops are discharged and the discharged ink drops are put on a printing medium by a method wherein discharge of materials extending over a wide range from a single nozzle is made possible. SOLUTION: Content ratios of coloring materials in liquid drops to be discharged are made different from one another. Sub-passages 54 for supplying a group of materials 53 including coloring materials to a main passage are provided at the main passage 52 for the materials that mainly gives a discharge force, and the material 51 mainly giving the discharge force and the grouped materials 53 including the coloring materials are prevented from being mixed together and as occasion demands, coloring orders for the coloring materials to be given to a matter to be coated are regulated. |
