| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a printing density controlling method of a colorless printed material 10, with which the printing density can be measured during printing, even when a coated amount can not be measured by the color density of a measuring light because there is nearly no change in the measured light from the colorless printed material 10 with a colorless ink. <P>SOLUTION: In the printing density controlling method at the printing with the colorless ink, printing is performed under the condition that a coloring material is added to the colorless ink so as to control the density of the colorless printing layer 21 by the color density of the coloring material also under the condition that the colorless ink is a colorless transparent perfumed ink, the coloring material is a colored coloring material or a fluorescent coloring material 33. <P>COPYRIGHT: (C)2007,JPO&INPIT |
