Currently The pressure on the survival of label manufacturers is increasing, raw material prices and labor costs are rising, and profit margins are gradually shrinking. In this situation, label manufacturers can only tap the potential internally, and by reducing production management, reducing material waste, improving yield, and thus controlling production costs. Since the proportion of ink in the production cost of labels is less than that of printing materials, many label manufacturers pay less attention to ink management. However, the ink is the same as the printing material. One of the printed materials, the quality of the quality and the amount of remaining (opened) and the way of use, has a lot to do with ink management. The quality of the printing materials is not good, and can be returned at any time, but the ink is not of good quality in many cases, but the remaining amount is too much. It is a pity that the remaining ink is thrown, but it is not easy to use, but it does not use much, it will cause Backlog and waste of funds. How to effectively manage the ink and control the amount of remaining ink is a problem that many label printing companies have to face. “Managing benefits†is obvious on this issue. Issues to be aware of in ink management include:
1. Use of primary color ink
When the new product is printed for the first time, the original color ink should be used as much as possible, instead of diluting the original color ink or adding other colors of ink to it, otherwise it will become a spot color printing, and almost every ink should be changed for each printed product. Moreover, if the ink dispensed in this way is printed and proofed by the customer, it will be necessary to adjust the ink in this way in order to formally produce it, which will inevitably add a lot of trouble to the printing enterprise. Therefore, when printing new products, the first sample is very important, and should be printed with primary color ink as much as possible.
In addition, it is necessary to explain to the customer that the main basis for judging the quality of the printed matter is to see whether there is a cut line, whether the level transition is natural, whether the branch transfer is successful, etc., but not just the color preference.
During the printing process, when adding ink to the ink tank, you must follow the principle of “less plus, plusâ€, that is, add it multiple times, and add less each time to keep the proportion of new and old ink in the ink tank, especially When the amount of ink is small, if too much ink is added to the ink tank at one time, it may be impossible to use one shift. After that, the performance of the ink has changed: the color is darkened, the leveling is deteriorated, and the knife line and the scraping are easy to occur. The ink is not clean, bubbles, etc., which has a great impact on the printing quality.
2. The deployment and use of spot color inks
Many products are now printed with spot color inks. Nowadays, the preparation methods of label printing spot color inks can be divided into two types: (1) the traditional color matching process, which relies on the accumulated skill and experience of the ink adjusters to control the color change during the ink adjustment. In general, the trade unions find out the approximate ink types and ratios based on past experience or from spot color, and sometimes even take out the approximate components of various inks by personal feeling, and measure them with electronic pounds, then put the various inks. Mix on the palette. After the mixing is completed, remove a small amount of the mixed ink with a spatula and scrape the excellent tape on the substrate to check if the hue is correct. If there is color cast, a small amount of ink can be added for fine adjustment. After completion, carefully record the type and amount of ink used, in order to prepare for the preparation of a large number of spot color inks. (2) Color matching is performed using an electronic scale, a color difference meter, and a proofing machine that are accurate to three decimal places. The tempering machine firstly adjusts the excellent sample according to my experience, and then uses the proofing machine to scrape the excellent sample, then uses the color difference meter to measure the color difference ΔE between the excellent sample and the customer standard sample, and determines the color difference value according to the color difference of the acceptable color of the customer. According to our experience, the general product, 2 ≤ ΔE ≤ 3; slightly demanding products, 1 ≤ ΔE ≤ 2; the most demanding product, ΔE ≤ 1.
The preparation of spot color inks is an important task for operators. There are several points to note when formulating spot color inks: (1) When adding ink, try to add different color inks. It is best to use primary color inks, and the less the color inks, the better the mixing effect. The more colors, the darker the brightness. . (2) With the principle of “from shallow to deepâ€, no matter the preparation of light or bright colored ink, care must be taken when the hue is close to the sample. (3) Ink produced by different manufacturers, it is best not to mix and call, try to use the same manufacturer of different colors of ink to color, otherwise it will produce uneven color tone, in severe cases will appear condensation and cause the ink to be scrapped. (4) Generally, a large amount of ink is added first, and then an ink of a small amount is added. (5) Some screen printing inks are dried by drying. The color of the light ink after drying is lighter than when it is not dried, and the color of the dark ink after drying is deeper than when it is not dried.
The above work is done well, and the remaining amount of primary color ink and spot color ink in printing will not be too much. So, how do the remaining primary inks be digested for various reasons? Under the premise of ensuring the printing quality, when the printing batch is large, the amount of ink is large, and the printing requirements are not too high, some old inks may be added from time to time, so that it can still consume a lot of surplus for a long time. Primary color ink. For spot color inks that are no longer used (not usable) for various reasons, they can be used to adjust to other spot colors. Generally, light inks are turned into dark inks.
It is worth noting that to control and try to digest the remaining ink, there must be a matching reward and punishment system for the printing operator, otherwise it will be difficult to achieve great results. Because no matter how ink is left, it is not as good as new ink. If there is no certain supervision and reward and punishment system, the operator will adjust the ink very casually, causing unnecessary waste.
The above content is selected from the " Printing Technology" of Science and Technology Media , Volume 1, 2012. For more journal content, please pay attention to the journal channel. The latest journal content is clicked into the electronic journal channel of Keyin.com.
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