| 摘要 |
PURPOSE:To elevate the quantity of color recording such as black or the like, by making the dot diameter in recording dot on paper with No.1 and No.2 dot recording elements be the same as the dot diameter with No.3 dot element. CONSTITUTION:For example, the ink of cyan, magenta and yellow are fed to No.1 to No.3 color recording nozzles 1-3 and recording is carried out by discharging liquid drops by the drive of piezoelectric element or the like. At that time, the nozzles 1-3 on carriage 5 are, in a horizontal straight line state, arranged. Then, in recording special color, for example, printing in black color, it is generated by making the liquid drops discharged from nozzles 1-3, while being mixed, reach the same point and the black dot B1 is formed. Further, the black dot B2 is formed from black color nozzle 4. Therefore, the black color recording time by nozzle 4 only can be reduced by half and the recording speed can be raised 2 times. Because the dot B1 is formed by mixing 3 colors, its dot diameter becomes larger than that of dot B2. Therefore, by making the diameter of nozzle 4 larger than those of nozzles 1-3, the diameters of dots B1 and B2 are equalized. |
