With the rapid development of economic globalization and high-tech industries, the economic and trade exchanges between China and other countries in the world are increasingly strengthened. The outer packaging of products has become more and more gentrified, and it can be said that Seiko is the best. China's packaging and printing industry has added a lot of color, but some products are still not satisfactory, and the outstanding point of exposure is the same batch of different colors. It not only affects the quality of the appearance of the product, but also damages the credibility of the company to varying degrees. As a result, customers are complained, and suppliers are disqualified. Once a customer seriously requests a return for the same batch of different colors, the company must also suffer huge economic losses, so the same batch of different colors in printing must be highly valued and must not be taken lightly.
Causes of different colors in the same batch People in the industry are all aware of what kind of back-and-forth the same batch of different colors bring to companies and individuals, but because it is a problem that often arises in print production. It is difficult to solve the problem and it is difficult to achieve effective control. This is what the quality inspector and the technical quality department have been dealing with in the management of soil. What causes the same batch of products in different colors?
(1) Problems in the configuration When the production notice is issued, the ink distributor should prepare the ink required for production. In the process of matching the color of the ink with reference to the printing of color samples, we must not have a close or similar thought. We must work hard carefully, earnestly, and rigorously. Try to keep the same with the color sample. If this is not enough, it is difficult to ensure the color difference is stable during the printing process. Of course, this requires that the configuration personnel must rely on years of experience in ink distribution. Machine personnel with a good ink to play like the color sample can only be verified by the quality inspector's proof. Once the quality inspector's approval is obtained, the ink distribution personnel is not the end of the matter, but it is necessary to record the configuration and record the brand name, model number, related accessories, and ink concentration of the ink one by one. Establish and improve the system of ink distribution for products, and provide reliable data for future refills due to insufficient ink. If ink distributors ignore or fail to comply with this effective approach, they will certainly produce different colors in the same batch.
If the production of products, large print volume, repeated the number of ink distribution, but also easily lead to the same batch of different colors. The reason is that many printing companies mostly work in two-shift or three-shift operations. Different shifts have their own ink distribution personnel, and the method of ink distribution will also be different. If the configuration staff can not seriously carry out the handover procedures or can not communicate in a timely manner, there will undoubtedly be buried in the same batch of quality problems.
(2) Several possible factors appearing in the production process In the printing production process, the machine leader should check whether the ink color of the printed product is the same as the proofreading color after the shift. If there is any change, the amount of ink should be adjusted in time. However, some leaders miss this due to lack of experience, but they blindly compare their product ink with the previous product. This is incorrect. To be more precise, it must not be based on shifts of ink on and off duty, which is likely to result in a wider range of chromatic aberrations.
(3) The concentration of ink, the speed of the equipment in the production process, the ink concentration is also related to the shade of shade, some collars worried that the thick and easy to glue the ink can not affect the completion of the fixed production. Therefore, it is not desirable to dilute the ink. In the case of holidays or weekends after the start of production, the ink will thicken due to precipitation, and the color difference of printed products will certainly change. The solution is to refer to the ink concentration of the sample (company printing ink dilute dishes), you can also choose to use the scrap car, wait until the ink and proofreading sample consistent with a new material for printing. This is an effective measure to avoid different colors in the same batch.
(4) The device's speed is too fast and too slow to affect the color difference. To know that the production speed is fast, all the rollers of the equipment will increase in temperature and heat, and the ink concentration will be affected. It is possible to talk about the ink to make it lighter and keep the speed as steady as possible.
(5) When the equipment is in operation, sudden failure of the equipment requires maintenance, it is necessary to remove the ink hook to close the transmission of the ink roller. To prevent the maintenance time from being too long The excessive accumulation of the printing roller causes a serious color difference in the ink.
(6) Because the residual paper fell into the machine during the production process, the automatic parking failure could not be discovered in time and the ink became lighter. Therefore, production personnel must constantly compare proofreadings, emphasizing the principle of self-inspection and special inspection as the supplement.
(7) Aging of the printing roller, and incomplete change of the color of the washing gel can also cause the same batch of different colors. In order to exceed the working hours, the lead machine over-emphasises that the color change is not thorough, blind production will cause a stepped color difference, resulting in a group of live three or four colors. The customer certainly cannot accept it.
All the above phenomena are the main reasons for the color difference. As long as we actively prevent it, we can overcome and eliminate this printing problem.
Reasons and Elimination Measures of Different Colors in the Same Batch in Packaging Printing
January 11 11:09:19, 2024
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