How To Do A Good Job of Packaging Printing Proofing with The Color

Printing package in an important job on the proofing with the color work, with the color with a good, color difference and other key quality issues will not have. Paper future network to share some basic knowledge about printing proofing with the color, for everyone to learn reference:

First, the importance of printing documents proofing with the color proofing is a good way to follow the color difference, if not proofing, no basis for following the color, relying solely on the design documents, is not reliable, because the computer color difference with the actual printing or a lot of differences, with the color can not rely on the subjective consciousness, the printing process is cumbersome, the impact of each process on the color difference is not the same, it can be seen with the importance of the color.

Second, printing with the color notes 1) on the film sheet, pay attention to the field part of the eye can not have holes (light leakage), CMYK each film's edge line must be completely coincident, do not spend the film, no scratches; 2) proofs must be carefully proofreading; 3) signing attention to the requirements of the paper, printing quality, delivery time, the requirements of the back channel process; 4) follow the order. ① to pay attention to the chromaticity of the printing; ② to the plate; ③ pay attention to the light part of the print there is no obvious dirty spots, at any time to point out, let the printing workers to wipe the plate; ④ to pay attention to the dark part of the print there is no redundant white spots or other color points, erase at any time; ⑤ every part of the print, the workers will be drawn out of a few to see the samples, the printing press run for a period of time there may be a certain color run light or run heavy phenomenon.

Third, digital proofing with the color problem 1, a color with the color problem printing production, a color (CMYK) with the color is more difficult, mainly due to the ink hue and the printer's ink hue is different, the printing of CMYK monochrome, plus or minus the amount of ink will only change the color of the color shades, will not change the color of the hue. Therefore, once the hue is not right, it will not be able to follow the digital sample. 2, neutral gray with the color problem neutral gray is also more difficult to follow a color system, in the printing process, in which a certain color version of the dot a little change, the human eye can feel it, for printing, control the dot in the small scope of the change is difficult. 3, the secondary color of the darker tones to follow the problem of the secondary color mainly refers to C + M, C + Y, Y + M, C + K, Y + K, C + Y + M, C + K, Y + K, Y + K, C + Y + K, C + Y + K, C + Y + K. + K, Y + K, M + K, these colors of the dark tone part of the printing with the color is also difficult to match exactly, the reason with the neutral gray with the same color, the human eye is very sensitive to these colors, printing ink supply a slight change in the amount of visual changes will produce a lot of changes. 4, the same color system of the large-area color block and the image of the combination of large-area blocks of color with a large amount of ink, and it is also easy to see the difference in color when the large-area blocks of color and image lined up in the same ink circuit. When the large-area color blocks and images lined up in the same ink path, the printing ink control is difficult to take care of both at the same time.

5, the opposite tone of the combination of the same ink key position with the main color of the opposite image, printing is not easy to follow the color. For example, the top row of a blue sky landscape, the bottom row of a portrait, in order to highlight the blue sky above, the need to increase the amount of C ink, and in order to highlight the skin color of the characters and the need to reduce the C ink. So that once the digital proofing deviation, not by adjusting the printing ink to follow the color. Fourth, the film sheet proofreading precautions Proofreading before checking whether the required information is complete each piece of film is not dirty, there are no traces of scratches on the line there is no lack of layout and text of the correct and error-free corner line and the color version of the overprint accuracy of the pattern is intact size there is no problem with the spot-color version of the color there is no error in the separation of the bite bit and around the film there is no the following: product name (and the output batch), size, color code, output date, producer code, color code, color code, color code, color code, and the color code. The following contents are available around the soft sheet: product name (and output batch), size, color code, output date, producer's code, and color correction strip.