| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a color tone control using an IRGB densitometer which costs lower than a spectrometer in texture color tone controlling of a printing machine. <P>SOLUTION: Set a target color mixers screen toner concentration for every ink supply unit width which is given when a printing texture is divided by ink supply unit width of ink suppliers 6 and 7, and meter a real color mixture screen toner concentration for every ink supply unit width of a final printing sheet obtained by printing using the IRGB densitometer 1. Convert each color mixture screen toner concentration into modulus of dot area, and convert it into monocolour screen toner concentration. Calculate an orthologous solid toner concentration deviation which corresponds with a deviation of target monocolour screen toner concentration and real monocolour screen toner concentration, and adjusts the amount ink supply in every ink supply unit width according to the orthologous solid toner concentration deviation by using a formula such as Yule-Nielsen. <P>COPYRIGHT: (C)2004,JPO |
