| 摘要 |
An ink jet printing method comprising forming an ink image directly on a printing medium according to image data signals and fixing the image to obtain printed matter, in which tone reproduction is based on conversion of density levels of the image data into sizes of ink dots, wherein a tone conversion table is prepared based on at least five characteristic curves representing the relationship of tone values versus energy for forming the ink dots, at least three characteristics curves are prepared each at a prescribed tone value in the half tone range, each having a converted energy value other than the maximum and minimum converted energy values, and the number of dots the converted energy for which is substantially the minimum is a half or more than a half of the total number of the dots at a tone value that is the least of tone values having a dot the converted energy for which is substantially the maximum.
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