As a manager responsible for production, I heard from a long time ago that my duty was to troubleshoot problems. However, over the years, I finally realized that my responsibility is actually to answer the questions and explain clearly the production issues that employees have reflected to me. In order to help employees identify the cause of the problem, I deliberately hung out a billboard.
Some explanations about inks: Problems and causes 1. Poor coloring performance = too low resin content 2. Subtle difference in level of background color after drying = Low viscosity (low plastic viscosity) 3. Low printing speed of printing machine = viscosity (Plastic viscosity ) High 4, the color is not printed = low ink film surface energy 5, after washing it again, the color becomes lighter = plasticizer content is too high do not understand this billboard? In fact, at first my employees couldn't read the billboard, but now it is beginning to work, and employees are beginning to look at the underlying causes. One day, the boss who did not talk about screen printing at ordinary times came to the workshop. After seeing the billboard, he asked for a detailed explanation. The content is as follows:
Some employees had come to my office and told me that more print heads should be used to print the multicolor jobs that have become more and more common. The production task they received was to use the ten-color printing presses of our factory to print eight-colored jobs. As a result, we encountered problems in the production process. I said to them that the problem may be in ink. I first checked the film and took a look to see if I needed to use all eight colors. I really needed to use eight colors. Then I went to see the press again. At that time, the eight-color job was being accepted twice at the third and sixth print heads. Fast drying process. I checked the rapid drying setup parameters - temperature, distance, and the speed of the press and found that everything was normal.
Next I saw two cooling steps immediately after the rapid drying process. The eight-color printing adds two more drying treatments and two cold treatments, a total of twelve processes. More than two processes. If there is no problem with the fast drying process, the ink layer is thin, and the press is in place, then the problem can only be solved by the last remaining factor: ink. After rapid drying, ink stickiness becomes a big problem. Manufacturers mix vinyl and plasticizers together when producing hot melt inks. In the mixing ratio, the amount of resin should be higher than the amount of plasticizer. Unfortunately, manufacturers do not always produce the ideal ink, which will give users trouble in print production. If the ratio is not appropriate, the simple solution (from the manufacturer's perspective) is to dilute the ink with a plasticizer. However, for printers, if the plasticizer content is high and the resin content is low, the resin will prevent the ink from becoming too sticky during printing (Note: if the plasticizer content in the ink is too high, the ink is not only more difficult Curing, but become thin, fluidity, feel softer). You should understand the relevant standards so that you can cross-examine your own judgments.
The rapid drying process does not affect the resin until the plasticizer is affected by the temperature. The problem at this time is that if the liquidity of the ink is too strong, the reaction of the ink to the temperature will be too strong, and the viscosity will not be reduced for a long time, which is unfavorable for production.
In this regard we have two options: switch to other brands of inks, or use dry processing additives. I told the boss that adding more resins (drying additives) can only temporarily solve the problem, so I have to switch to other brands of ink. "After quick drying, the surface of the ink is smooth, but the subtle differences are slight." (To be continued)
Some explanations about inks: Problems and causes 1. Poor coloring performance = too low resin content 2. Subtle difference in level of background color after drying = Low viscosity (low plastic viscosity) 3. Low printing speed of printing machine = viscosity (Plastic viscosity ) High 4, the color is not printed = low ink film surface energy 5, after washing it again, the color becomes lighter = plasticizer content is too high do not understand this billboard? In fact, at first my employees couldn't read the billboard, but now it is beginning to work, and employees are beginning to look at the underlying causes. One day, the boss who did not talk about screen printing at ordinary times came to the workshop. After seeing the billboard, he asked for a detailed explanation. The content is as follows:
Some employees had come to my office and told me that more print heads should be used to print the multicolor jobs that have become more and more common. The production task they received was to use the ten-color printing presses of our factory to print eight-colored jobs. As a result, we encountered problems in the production process. I said to them that the problem may be in ink. I first checked the film and took a look to see if I needed to use all eight colors. I really needed to use eight colors. Then I went to see the press again. At that time, the eight-color job was being accepted twice at the third and sixth print heads. Fast drying process. I checked the rapid drying setup parameters - temperature, distance, and the speed of the press and found that everything was normal.
Next I saw two cooling steps immediately after the rapid drying process. The eight-color printing adds two more drying treatments and two cold treatments, a total of twelve processes. More than two processes. If there is no problem with the fast drying process, the ink layer is thin, and the press is in place, then the problem can only be solved by the last remaining factor: ink. After rapid drying, ink stickiness becomes a big problem. Manufacturers mix vinyl and plasticizers together when producing hot melt inks. In the mixing ratio, the amount of resin should be higher than the amount of plasticizer. Unfortunately, manufacturers do not always produce the ideal ink, which will give users trouble in print production. If the ratio is not appropriate, the simple solution (from the manufacturer's perspective) is to dilute the ink with a plasticizer. However, for printers, if the plasticizer content is high and the resin content is low, the resin will prevent the ink from becoming too sticky during printing (Note: if the plasticizer content in the ink is too high, the ink is not only more difficult Curing, but become thin, fluidity, feel softer). You should understand the relevant standards so that you can cross-examine your own judgments.
The rapid drying process does not affect the resin until the plasticizer is affected by the temperature. The problem at this time is that if the liquidity of the ink is too strong, the reaction of the ink to the temperature will be too strong, and the viscosity will not be reduced for a long time, which is unfavorable for production.
In this regard we have two options: switch to other brands of inks, or use dry processing additives. I told the boss that adding more resins (drying additives) can only temporarily solve the problem, so I have to switch to other brands of ink. "After quick drying, the surface of the ink is smooth, but the subtle differences are slight." (To be continued)
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