subject: Digital proofing color Precautions and steps - digital proofing, color - Printing Industry [print this page] Digital proofing color Precautions and steps - digital proofing, color - Printing Industry
1. Adjustment Printer Linear To Digital Proofing Color, first of all need to be adjusted Print Linear machine, printer paper and ink using different when the linear difference; printer status changes, linear will change. The accuracy of linear gray wedge through the printing speed inspection, linear control of the most critical issue is to ensure that not a partial color cast that is biased against the different tone, different colors, and if the dark some of offset color, halftone or light tone has chosen a different color, so, after the adjustment very difficult. 2. Print Comparison of ICC and ICC printer Printer ICC color gamut than the best color gamut printing ICC, if the printer color gamut than the printing color gamut, on the possible effect of partial light proofing. When the original in both images, there are the same color of shadows blocks of color, the printing with good color, with images and the darkened blocks of color density is not enough gray hair; with darkened blocks of color, the image is passed deep, and may even paste version. This scalability is not the printer ICC color matching was not good enough, need to redo. Cause printing ICC color gamut is smaller for many reasons, mainly printing paper, ink causes the paper is too thin, poor performance ink, ink impurities, late decline in the quality, will all result in reduced print color gamut. To view the printing and proofing ICC ICC for the presence of hopping, jumping, if there is such color proofing page can not be properly simulated time. ICC led to the printing color gamut jump was mainly attributable to the printing dot gain; printer ICC jump cause is the printer does not do a linear, linear printer needs correction, amendment or redo ICC. In ProfileMaker5 on printing and printer ICC for ICC color gamut comparison. It can be seen in the darkened area (L value is 23), print color gamut can not contain printing color gamut, color outside the color gamut that can not be simulated normal proofing. Produce this situation there are two possibilities, one-color printing is not the normal target, a large degree of color cast; Another possibility is to print color field is too small, need to redo the printer ICC file. Also, you can see in the picture the edge of the printing color gamut is not smooth transition occurs, if the source to adjust accordingly printing digital proofing, many color simulation allowed. 3. Use of third-party software to adjust ICC file Often through third-party software that we need to adjust the ICC. ICC software editing a lot, but color correction is the same basic idea. Below to ProfileMaker5 to illustrate the basic steps of color correction. (1) background correction. According to the company's production needs to decide whether to retain the background color, and can adjust the background color based on the actual situation of the color. (2) using the gray balance tool gray balance correction. Through the neutral gray wedge sampling to test the effect of adjustment (Note: gray balance all the color change would impact the rate of adjustment should not be too large). (3) using a linear tool calibration CMYK color cast the basic color, especially color correction K. The adjustment process should pay attention to changes in gray balance. (4) using a linear adjustment tools on the secondary color C + M, C + Y, Y + M, C + K, Y + K, M + K to be corrected. Particularly those of dark color tone, middle tone part. (5) again on the CMYK color selective school. Selective color correction is for the printer is ink, and in general, the more a single color, the better choice for the synthesis of neutral gray, use of selective color correction of the effect is not apparent, with gray balance adjustment tool The impact will be better.
