Theoretical analysis of the most popular ink color

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Theoretical analysis of ink color matching

in fact, many people believe that when they buy a lot of equipment, they can apply it immediately. This is a wrong idea. Because the software itself is just a computer with a preset formula, how can we calculate the answer without substituting the formula into the number! These figures are the ink materials we use for color matching. First of all, we must establish a complete set of ink data base. The database is the core of the whole color matching system. All data for future calculation will be found here. We use the spectrophotometer to input the colors of dozens of inks into the computer, and the computer will convert them into visible spectrum data. The stability and accuracy of the data play an important role. If the actual materials are inconsistent with the input data, it is meaningless. Therefore, this database must be established according to the materials used by the company on a daily basis

inks are produced by different companies or regions, and their color changes and printing characteristics are different. In addition, the printing conditions used by each printing company are also different. In other words, what we do is a customized database. For example, the company has a large number of orders and often needs to do the post-processing of varnish. In the past, the masters had to consider two factors when the production resources were more relaxed:

1) the color change of the printed matter after drying

2) the color change of the printed matter after being oiled faced with many considerations such as academic, emotional and career choices

in order to balance these factors and control the production quality, Often spend a lot of time and waste a lot of materials to adjust the tone of printed matter. In fact, when we use computer color matching, we can take these two factors into account. When we create a database, we input a data with gloss effect. In this way, whenever a gloss effect is required, the computer will calculate the formula containing the gloss effect data. From then on, master will no longer spend a lot of resources to adjust the ink color. If users or customers have no confidence in direct production, they can make a trial draft in advance and use the IGT printability tester for prepress test

this leads to another problem. Since the effect of varnish treatment can be predicted, can the color of paper be included? Certainly. Once the small crack size reaches the critical size, the paper color and ink penetration are included, because whether the ink/pigment used by the user is transparent has been considered in the color matching software. If the printing method depends on the substrate to develop color, the substrate color will be considered when calculating the formula

foreign countries generally adopt fully automatic clamping. On the other hand, different papers have different absorbency. However, this variable affects our final printing results. Take book paper for example. When printing this kind of paper, masters often worry about the change of color after the ink dries. The color is much darker than that of the newly produced printing sheets. Therefore, the color matching system also takes this into account, that is, the database is created and the two types of paper are processed separately. They are coated paper database and uncoated paper database respectively

white ink and transparent ink

generally speaking, in the traditional color matching method, masters will add a large amount of white ink to dilute the color concentration, or it is easier to control the color change during ink mixing; Another purpose is to increase ink coverage. It is common to add a large amount of white ink with pink or emulsion colors, but in fact, white ink is not often added. Another advantage of computer color matching is that it can reduce the amount of white ink, or even not. It all depends on the color of the substrate. Reducing the use of white ink does a lot of good for printing plants. Because white ink pigments are coarser and harder than ordinary ink pigments, it will increase the loss of printing plates during production, and sometimes reduce the printability of the ink itself, such as abrasion resistance, drying time, etc. On the other hand, white ink is generally more expensive than transparent ink, which will increase the cost. Therefore, we all suggest to use transparent ink instead of white ink for color matching as much as possible

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