Analysis of Gamut on Hi-Fi Six Color Printing

In order to get some rules of high-fidelity six-color printing about color transmission and dot transmission,we make test plates using 2~(nd)-order FM dots,through a series of pre-press color management theory and technology,combing with kinds of color management software,and in accordance with the characteristics of high-fidelity printing.According to measuring the chats of the test plates,we can make profiles of high-fidelity six-color printing,and then we can get the gamut.Compared with the gamut of four-color printing,digital printing and ink-jet print,the advantages of Hi-Fi printing will be found.And then separation tests are made by means of using six-color profiles.Otherwise,we can get some rules of dot transmission according to measuring dot areas of Hi-Fi printing chats.The results show that the gamut of printing can be effectively enlarged by improving the numbers of original colors,and the gamut may be enlarged above 20%than four-color printing.The gamut of digital printing can match with traditional four-color printing.The gamut of high-fidelity six-color printing is smaller than eight ink-jet print,but still have some advantages in some color areas.Second-order FM dots areas are enlarged much,and the max level is more than 25%.