| 摘要 |
PURPOSE:To elevate resolution of a magnified print image to be obtained by a same scan time and to shorten scan time of an ink spray gun, by a method wherein a first and a second ink spray groups so arranged that respective scan lines agree with each other to make printing and an image by superposed upon each other, and a white ink layer is interposed between them. CONSTITUTION:A scan line of an ink spray system 21 in a first ink spray system group 19-1 and that of the corresponding ink spray system 21 in a second ink spray system group 19-2 are so established as to be superposed with each other. An interval Y in those subscan direction is so established as to become Y-P.l by taking l as a lead of the scan line and P as a positive integer. Further, a white ink spray gun 20 spraying continuously white ink is arranged between the first and the second ink spray system groups 19-1, 19-2, which is so established as to be positioned behind the first ink spray system group 19-1 in the subscan direction so that a white ink streak can paint out the script image which are drawn with the first ink spray group 19-1. |
