In the daily production process, the problem of maintaining the consistency of label printing color has always been a difficult problem for production operators. Therefore, let's introduce the methods to control the color consistency of label printing.

一、柔印中網(wǎng)紋輥參數(shù)關(guān)乎顏色的一致性。

1、 The parameters of anilox roller in flexo printing are related to the consistency of color.

柔印標簽產(chǎn)品的顏色除了受油墨色相、網(wǎng)點大小和密度的影響以外，還受網(wǎng)紋輥的網(wǎng)線數(shù)和網(wǎng)穴深淺的影響。一般情況下，網(wǎng)紋輥的加網(wǎng)線數(shù)與印版加網(wǎng)線數(shù)的比例為3：1或者4：1。因此，在使用柔印設(shè)備印刷標簽產(chǎn)品時，為了保持與樣品顏色接近，除了在制版過程中要注意網(wǎng)點的大小與密度盡量與樣品一致外，還要注意網(wǎng)紋輥網(wǎng)線數(shù)和網(wǎng)穴的深淺，通過調(diào)整這些參數(shù)來達到標簽產(chǎn)品與樣品顏色接近的效果。

The color of flexographic label products is not only affected by the ink color phase, dot size and density, but also affected by the number of mesh lines and the depth of mesh holes of anilox roller. In general, the ratio between the number of screening lines of anilox roller and the number of printing plate screening lines is 3:1 or 4:1. Therefore, when printing label products with flexographic printing equipment, in order to keep the color close to the sample, in addition to paying attention to the size and density of mesh points as consistent as possible with the sample in the plate making process, we should also pay attention to the number of mesh lines and the depth of mesh holes of anilox roller, and adjust these parameters to achieve the effect that the color of label products is close to the sample.

二、合理的顏色管理制度。

2、 Reasonable color management system.

1、明確產(chǎn)品顏色的上下限。

1. Define the upper and lower limits of product color.

在我們生產(chǎn)某標簽產(chǎn)品時，可以先制定出該標簽產(chǎn)品顏色的上限、標準和下限，經(jīng)客戶確認后定為“樣張”，日后的生產(chǎn)中就以樣張的標準顏色為基礎(chǔ)，并嚴格規(guī)定顏色的波動不能超過上下限，這樣，在保證標簽產(chǎn)品顏色一致性的同時，還能給生產(chǎn)人員一個合理的顏色波動范圍，也使產(chǎn)品的顏色標準更具可操作性。

When we produce a label product, we can first formulate the upper limit, standard and lower limit of the color of the label product, which will be determined as the "sample sheet" after confirmation by the customer. In future production, we will take the standard color of the sample sheet as the basis, and strictly stipulate that the color fluctuation cannot exceed the upper and lower limits. In this way, while ensuring the color consistency of the label product, It can also give the production personnel a reasonable color fluctuation range and make the product color standard more operable.

2、完善首尾件簽樣、巡檢及抽檢制度。

2. Improve the sample signing, patrol inspection and sampling inspection system for the first and last parts.

應(yīng)將標簽產(chǎn)品顏色的檢驗項目加入到標簽產(chǎn)品首尾件簽樣制度中，這樣便于生產(chǎn)管理人員對標簽產(chǎn)品顏色差異進行控制，不合適的標簽產(chǎn)品堅決不予檢驗通過，同時加強巡檢和抽檢，以保證在標簽產(chǎn)品印刷生產(chǎn)過程中能及時發(fā)現(xiàn)和處理超出 色差合理范圍的標簽產(chǎn)品。

The color inspection items of labeled products shall be added to the sample signing system for the first and last parts of labeled products, so as to facilitate the production management personnel to control the color difference of labeled products. Inappropriate labeled products shall not pass the inspection. At the same time, patrol inspection and sampling inspection shall be strengthened, To ensure that label products beyond the reasonable range of color difference can be found and handled in time during the printing and production of label products.

三、印刷標準的光源問題。

3、 Printing standard light source problem.

建議在印刷過程中使用印刷標準照明光源來進行照明，有條件的企業(yè)還需要配備標準光源箱，以便讓員工在標準光源下面進行標簽產(chǎn)品的顏色對比，有效的避免由于照明光源不標準導致的印刷品色差問題。

It is recommended to use the printing standard lighting source for lighting in the printing process. Conditional enterprises also need to be equipped with a standard light source box, so that employees can compare the color of label products under the standard light source, so as to effectively avoid the color difference of printed products caused by non-standard lighting source.

四、油墨問題會導致色差。

4、 Ink problems can cause color differences.

標簽印刷企業(yè)在使用油墨時一定要注意使用正規(guī)廠家生產(chǎn)的油墨，同時要注意油墨的保質(zhì)期，及時更新庫存，以免使用過期油墨。另外，在印刷生產(chǎn)過程中要注意油墨添加劑的使用量，如果油墨添加劑使用過量，也可能導致印刷后油墨的顏色產(chǎn)生變化。因此，在使用各種油墨添加劑時建議先與油墨供應(yīng)商進行溝通，再確定添加劑的正確比例范圍。

When using ink, label printing enterprises must pay attention to the ink produced by regular manufacturers, pay attention to the shelf life of ink, and update the inventory in time to avoid using expired ink. In addition, pay attention to the use of ink additives in the printing production process. If the ink additives are used excessively, the color of the ink may change after printing. Therefore, when using various ink additives, it is recommended to communicate with the ink supplier first, and then determine the correct proportion range of additives.

以上就是控制標簽印刷顏色一致性的方法，除此之外，還可以根據(jù)專色油墨的顏色和印前制版與顏色的一致性來控制。

The above is the method to control the color consistency of label printing. In addition, it can also be controlled according to the color of spot color ink and the consistency between prepress plate making and color.