How to reduce the problem of color difference of printing

How to reduce the problem of color difference printing, I believe we will have encountered a similar problem. This morning, one of our old patrons brought us a style map, which required us to print the handbag and put a straight print on the digital proofing shop with a color of 157 grams of double copper. When placing an order, guests are required to use 250g single copper. We emphasize there will be color can be customers that no time to call us to ignore.

In the printing process, the red paper bag is not red enough, should not be particularly red. Customers have seen that color so right, then re-production too late. Try to increase the red, blue smaller.

Why such a bad color difference, why is it so big? The original proofing digital direct printing, using 157 grams of double copper, and the file has been modified customers. In many cases, the client said that I was reducing the file or change the file. But sometimes they have no intention to change it. There are no proofs of new documents, printed directly out of the film. So at this time the color is relatively large, but also one of the main sources of color.

How to avoid it?

First, the design of the problem, many designers simply do not understand printing or printing to understand some of the unprofessional, so the design of the document looks good, it is difficult to do. As many times designers make black C, M, Y, K100% of the field, overprint anti-letter printing, is this black is very good looking, printing it? Increase the difficulty, so much ink, it is difficult to control. Especially thin paper, ink is too large, it is difficult to control the balance of ink, paper walking is also difficult to take a good print, often downtime. How can such a color without bias, all the way out of print, all the way. There are four-color collision out of the flat screen, only one color is not controlled, the color difference is larger.

Second, the main source of color, captain caused by improper operation. Requires a higher color block instead of spot color printing, especially the large amount of ink or flat screen color. If the large amount of ink can not be changed to spot color printing, do not do small fonts or graphic lines in large color blocks, to increase. Can not be made into four-color printing, in short, the method is there

Third, as long as the file changes, be sure to proof. If the color is very demanding, it is best to play traditional style, what paper printing, what paper proofing. To achieve unity, this color will be blocked at the source. Especially new customers must do this. Digital sample is not? Row. But not as good as traditional. Digital proofing must be played in the manufacturers there, the general manufacturers have CTP. Digital machines and printing press parameters into one, so hit out of digital samples, printing and color can reach more than 90%. Unfortunately, many CTP printers do not have the parameters adjusted to the press, or they do not.

Fourth, the process according to row to be reasonable, before the row, to review the project list, the process by row.

Now more and more advanced printing presses, the captain of the requirements of many printing companies (bar code printers

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