As many people work at home for a long time, many people are beginning to find that sitting on the sofa and looking at a laptop can cause back and neck pain and damage their health.
The ability to switch between sitting and standing during the day allows employees to stand up and move around while continuing to work. With the Sit Stand Desk however, you can actually get back to enjoying the work you produce.
Standing intermittently throughout the day can make your heart healthier and posture better. Not only are Adjustable Height Work Tables a great way to ensure productivity and effectiveness while at work, they are also good for your health as well, reducing back and neck pain and lowering the risk of obesity.
The following are several of the major benefits to using a Standing Desk:
In the past 10 years, domestic corrugated carton printing has developed rapidly. In addition to introducing many advanced technologies and equipment, such as the United States Langston, France Martin, Kiel, Sweden Emba, Japan Mitsubishi Heavy Industries, etc., there are more than 30 Domestic manufacturers produce and sell corrugated carton printing slot machines, such as Capital Aerospace Machinery Corporation, Shanghai Printing and Packaging Machinery Corporation Carton Machinery Branch, Handan Packaging Machinery Plant, Shaanxi Printing Machinery Co., Ltd., Guangdong Nanhai Dongfang Carton Machinery Plant, Zhaoqing Jialong Packaging Group companies, Shijiazhuang 517 Packing Machinery Factory, Taiwan Yan Iron Machinery Industry Co., Ltd., Yuli Machinery Co., Ltd. and so on. At present, most printers use corrugated paper to form flexographic printing processes such as printing, slotting, and die-cutting, and some cities along the coast are groping for color screen printing on corrugated boxes, and have achieved initial success. Flexoprinting is the most ideal printing method for corrugated cartons, which is suitable for the characteristics of corrugated paper, meets the quality requirements of products, and can also form scale production. Therefore, corrugated box printing companies should vigorously use flexo printing technology. The problem now is that with good printing technology, it is not always possible to print good products. Therefore, how to produce print products that meet the printing quality of corrugated paper has become a topic of common concern. I hereby talk about some opinions for your reference.
1. About the number of lines of the anilox roller
I have published opinions on this issue in the past. After a few years of contact with some manufacturers, I found that the number of anilox roller lines tends to be high in actual use. Most printing products use 200 lines/inch anilox roller and 400 lines/inch anilox roller for screen printing. The result is insufficient ink. Some places are not printed accurately. In some places, the printing is white and the ink is light. Eye-catching. Kraft paper or gray-white cardboard is a paper with a rough surface and a large amount of ink absorption. If the number of anilox roller lines is high, and the use of inferior ink, the amount of ink is not enough. Corrugated paper should be printed more ink, not less, because corrugated paper absorbs large amounts of ink, ink, spot color ink, stacked ink less, if the number of anilox roller used is high, the result will be counterproductive. Therefore, in corrugated box printing, 150 lines/inch anilox roller should be used for general printing, and 200-250 lines/inch anilox roller should be used for screen printing.
2. The relationship between the number of anilox roller lines and the number of plate lines
When printing in flexible packaging, the ratio of the number of anilox roller lines to the number of printing plate lines is generally selected to be 5:1, and sometimes even higher. Corrugated box printing can not be selected so high, the key is to consider the amount of ink. Currently, the number of screens printed on corrugated paper is generally 40-60 lines/inch, and 80 lines/inch are not many. Thickness of the printing plate network line, the amount of ink is larger to meet the law. If the printing plate is 60-80 lines/inch and 300-400 lines/inch anilox roller is used, the amount of ink will be insufficient. Therefore, if the printing plate is 100 lines/inch, it is obviously unreasonable for the anilox roller to select 500 lines/inch in a ratio of 5:1. Therefore, when the number of plate lines on the corrugated box is high, the ratio of the number of anilox roller lines to the number of plate lines should be appropriately reduced. The ratio of the number of anilox roller lines printed on a corrugated box to the number of plate lines is by no means a constant constant. Personally, I personally think that the current ratio is about 3:1 more appropriate.
3. Net line image and ink block should be printed separately
Network line images and on-site ink blocks are often not easy to grasp due to the difference in ink volume and pressure needed for printing. If ink pads are taken care of, they will create dots or pastes; if they take care of outlets, the field will It seems that the pressure is not enough. The ideal is to separate the field from the cable. But now some patterns either have gradient meshes or large area lines or small pieces of ink; or there is a large area of ​​ink blocks, a small part of network lines, it is difficult to separate the two. When this is the case, it is recommended that wherever a polyester hanging sheet is used, the field part is affixed with a sheet of polyester film to increase the pressure on the field part. If the image consists of a large-area field, small-area network cable, the polyester film on the cable can be removed. If it is a gradient mesh, when the field part of the sticker, you should pay attention to the transition between the field and the cable, the paper must be cut into a zigzag, so as to avoid hard mouth.
Because the network cable and the actual ink requirements are different, it is not reasonable to print three-color cable screen printing on a three-color flexo printing machine, but it is also not reasonable, because the three-color flexo printing machine is the line of the Internet roller. The number is configured according to the requirements of the screen printing. It is not suitable for printing in the field. If a narrow-width flexo press can be solved by changing the anilox roll, it is inconvenient to replace the anilox roll with a corrugated-box flexo press. Therefore, a unit with a large number of printers should consider setting up a dedicated machine to separate the live network printing from the on-site printing, and the qualified units should purchase a five-color machine.
4. Advocate the use of photosensitive resin plate
Photopolymer is ideal corrugated box printing plate. Many units that have used photosensitive plates have phased out manual engraving. The thickness of the photosensitive resin plate is uniform, the hardness is moderate (without filler), the operation is easy to use, and it can meet the requirements for copying high-quality prints. Due to its uniform thickness, the school bus is fast and the printing pressure is easy to grasp, so the printing quality is good.
5. Correct use of rubber gasket
Now carton printing basically uses a photosensitive resin flexo plate with a thickness of 3.94 mm, and a plate underpad rubber pad. In doing so, on the one hand, the cost can be reduced, and on the other hand, the printing quality can be improved. The hardness of the rubber liner is HS25, which is lower than the hardness of the printing plate. After the printing roller is pressed, the rubber liner is first compressed, thereby reducing the deformation of the printing plate and improving the printing quality. In addition, the rubber liner has good resilience and can compensate for the lack of thickness and unevenness of corrugated paper. This is also the reason why rubber gaskets are used in corrugated box printing.
In use, as long as you do not stick the ink to the liner, the rubber liner can be used repeatedly. Some units have been used for 1 year or even 2 years. The ink is pervasive, and there are many micropores on the rubber liner. Once it is stained with ink, it will fail due to loss of elasticity. If used properly, the cost of the liner is not high.
Some time ago, a company asked us to consult and asked why the ink ribbon in the circumferential direction would appear color difference, and the printing service would not be acceptable. Anilox roller used for flexo printing is very uniform and stable, and there is no ink and ink balance problem compared with offset printing. If the ink and pressure are well mastered, not only the same batch of products, but even the color difference of different batches of products is small. This is recognized by everyone. Because the anilox roller is a quantitative roller, the distribution of the cells is uniform, and the metal anilox roller is not easy to block ink, and there should be no color difference. There may be several reasons why this company produces color differences in printing: (1) Plastic liners are used (it is understood that they do use plastic liners). The poor resilience of plastic may start to be somewhat elastic. Plastic deformation will occur later and the original shape will not be restored. In this way, the ink will fade due to the pressure difference. (2) The accuracy of the flexo press is low and the radial runout is large, causing periodical pressure inhomogeneity and chromatic aberration.
6. Pay attention to the parallelism of the 4 roller axis
4 roller refers to the rubber roller, metal anilox roller, plate roller, and embossing roller. The 4-axis axis line is the most basic condition for printing quality. The machine technician should be regularly checked to find that the ink is not correct in time. When we went to school buses in some factories, we found that some printers had four rollers that were not parallel and that some of them had an error of 0.5 mm or more, which would definitely affect the quality of printing. Corrugated box printing should generally control the error of 4-roll parallelism within 0.05 mm.
When correcting the parallelism of the four rolls, the pressure of the embossing roll and the metal anilox roll was tested and corrected on the basis of the printing roll. If the four rollers are not parallel, the ink will not be evenly distributed, and the printing pressure will be uneven. This will cause the print to have a color difference.
In addition, the accuracy of the anilox roller and the center height of the rubber roller cannot be ignored. Metallic anilox rollers for corrugated box printers are generally mechanically extruded and easily deformed. Therefore, it should be accepted at the time of purchase, and its accuracy should be within 0.04 millimeters.
If the center of the rubber roller is unreasonably designed and processed, the ink on the anilox roller will not be able to squeeze out and the ink volume will be too large. When the anilox roller is in normal operation, it should be seen that there is metallic luster (net wall part). If the metal luster cannot be seen after adjustment, the rubber roller should be replaced.
7. Master the performance of ink
The relevant experts on this issue have already talked about a lot. Here are some brief points. (1) Use a test strip to measure the pH value of the ink. If it is acidic, the binder in the ink—the resin will precipitate and become insoluble, and the performance of the ink will be completely destroyed. Some prints are not water resistant, and the pH is acidic. Alkaline is too high, there will be more foam and ink thickening phenomenon. PH value should be controlled at 8.5-9. (2) Grasp the color density and hue of the ink. The color density of the inferior ink used today does not meet the standard, and the printer can use the reflection densitometer to detect it. The hue can be detected with the color wheel produced by the Shanghai Printing Technology Research Institute. The ink is rolled on the paper to be printed and then visually measured. This method is relatively simple. (3) Drying properties of ink. Due to the large area of ​​corrugated cartons, the roller contact with air, and the slow printing speed, the ink must be dried at a slower speed. Otherwise, the ink can be easily dried on the plate, causing uneven printing on the ground. . When a parking ink is dry and not easy to water, it is recommended to exchange the ink. (4) The flow of ink. You should purchase measuring cups for measuring the flow of ink, especially when printing a multi-colored ink. Note that the latter color is slower than the previous color ink, otherwise the multi-colored ink stamp is not good. Ink and ink contains yeast and amines, which are easily volatilized, making the ink thicker and prone to paste. (5) To master the use of accessories.
8. Grasp the pressure of printing
The printing pressure is very important for the printing quality. I have previously written an article in this respect. Please refer to "Printing Technology" 2000, No. 5, p. 62, and I will not repeat them here.
In short, there are many factors that affect the printing quality of corrugated cartons. For example, the quality of color separation is the most important thing. If the original color separation is not well restored, the master printer is also at a loss. In addition, there are loading technology, corrugated board quality, and types of corrugated board used. Practice has proved that the use of flexo technology is most suitable for corrugated cartons. We would like to make joint efforts to print out high quality corrugated cartons
Adjustable Computer Desk is very helpful to a healthy lifestyle and can solve your sedentary problem.
Lowers risk of obesity
Reduces back and neck pain
Improves cardiovascular health
Lowers blood sugar level
Increases energy level
Increases productivity
May lead to a longer life
Lowers risk of obe
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