Analysis of Printing Quality of Metal Packaging

The quality of the printed iron products originates from the management of product quality at all levels of the relevant management personnel and the operator's understanding and pursuit of the quality of each printed iron product. While providing customers with printed logos, customers are required to faithfully restore the graphic colors provided. From the point of view of conventional requirements, people believe that a good quality Indian iron product should be a product that is true and credible in color and has a full range of shades. Experiments have shown that people can only come up with more objective evaluations after comparing multiple pictures and pictures together. If you take out a printed iron product image alone, people's views are often inconsistent. In addition, under certain conditions, people may propose opposite opinions on the quality standards of graphic texts. In actual operation, the customer has other requirements for printing iron products in addition to the implementation of enterprise standards. Generally, the customer will make clear requirements in the two parties' loan (processing) contract after consultation with the sales staff or technical personnel of the printing company. When printing iron companies arrange production processes and organize production, in addition to implementing corporate standards, they must also consider fully meeting customer requirements for product quality.

From the standpoint of the quality of conventional printing iron, the credible color is the key to the quality of Yintie's graphic and text. The authenticity of color must first be of good quality. At present, the quality of the domestic quality of the printed iron is uneven, and a considerable portion of the original needs to be re-created or modified for use. Followed by the graphic scanning skills, according to the actual size of the text before scanning to determine the magnification of the text. Too much and too little magnification can cause subtle levels of loss, and ultimately affect the authenticity of copying images. At the same time, the calibration of black and white field selections, the selection of GAMM values, the USM setting, and the color adjustments during the teletext scan will all affect the reproduction of subtle levels, which all require special attention. Third, do not arbitrarily enlarge or reduce graphic texts during computer production. In particular, repeat magnification and tone adjustment registration for many times. Finally, the number of screen lines should be determined by the print and print product requirements. It is not possible to use the plate-making means with a high number of screen lines. Color is the place that customers are most concerned about, and it is also the most difficult place for Yintie. People generally demand that the colors are authentic and credible, but the colors themselves are highly subjective, and each person's preference for color is inconsistent. Therefore, in addition to providing originals, customers in printing companies often provide PANTONE color code numbers for colors that need to be emphasized to facilitate the color control of printing staff. In actual operation, in order to ensure the color requirements of the customer's processed products, it is usual for the printing company to organize iron proofing of the manuscript provided by the customer. Printing iron proofing is actually a printed iron analog production. To determine the color number of the separation, the color sequence of the printing plate, the number of plate-making screen lines and the angle of the screen, the selection of the printing ink, the selection of the tinplate, and the determination of the printing machine. After the proofing with the printing iron, the stamping iron product includes the entire process of color production. Once the customer confirms, the production process has a more mature operating process. After printing and iron proofing, the sample should be submitted to the customer for confirmation. If it is not satisfactory, it should be re-proofed according to the customer's revised opinions and once again handed over to the customer for confirmation. In the normal production of iron, the operator of iron printing is to strictly follow the kind of iron confirmed by the household. It is not possible to change colors by subjective wishes.

The complete shade of Yintie graphic is actually the saturation and tone. First of all, we must ensure that the graphic level is complete in color. In a well-toned image, the lifting of the histogram should have the same gradient as the hillside and fall within the histogram from the beginning to the end. If a vertical steep slope appears at the two ends of the histogram, then the highlight or dark tone in the hierarchy is intercepted by the city, and the high light or dark tone level has been lost. If the two ends of the image tone or the end of the image is a certain distance from the histogram, the image hierarchy has been compressed. The key to ensuring a complete hue is the original manuscript. Manuscripts have a direct influence on the quality of images and texts in the entire process of shooting, processing, scanning, and production. Under the premise of ensuring quality, that is, the condition of complete tone levels, then the level of compression should be considered. The level of graphics and text should be compressed within a certain range. This is because the printing and textuing of iron and steel in the production of prints, PS plates, tinplate (or aluminum skin), ink and other conditions and restrictions on the printing process. Take Yintieji for example, the equipment conditions of each printing company in China are different. Generally divided into two categories, namely imported iron printing machine and domestic iron printing machine. Imported iron printing machines are represented by the United Kingdom and Japan, and are mostly two-tone iron printing machines. The material of the equipment, the accuracy of overprinting, and the linear speed consistency of the three rollers after lining are at the leading level in the country. The domestic iron printing machine is slightly inferior to the above three indicators. Therefore, considering the printing machine alone, the amount of compression at the graphic level will vary from machine to machine. With the advancement and backwardness of the plate making method, the difference in compression is large and the amount of good compression is relatively small. In addition, the quality of the ink will also affect the level of compression requirements. At present, the quality of domestic ink also has a certain gap. Relatively speaking, the quality of the inks produced by imported or wholly-owned enterprises is better, mainly due to the good color printing performance, fine pigment particles, good coloring power, and relatively pure colors. The price of ink produced by domestic or joint ventures is relatively cheaper, but there is still a certain gap between physical and chemical properties. Therefore, the factors affecting the printing ink should also be taken into consideration when compressing the layers. In particular, the high-light point of view cannot be printed, which is directly related to the accuracy of the printing machine, the difference in the plate making methods, and the size of the ink pigment particles. And because of the printing of iron and printing, the dot expansion, resulting in a large area of ​​ideas and paste into the ground. The smallest dots that can be printed and the big dots that will occur are the range of the tone output of the Yintie graphic. Therefore, the tone range must be adjusted. In fact, the calibration of black and white fields in scanning is to limit the hue to a certain range of tones, that is, to make level compression. The quality of the conventional printing iron is basically a high-light continuous network, dark tone is not ambiguous, high light is not the net is to ensure that the best point in the graphic and also out of the small ideas. In actual production, the expansion of the ink area of ​​small outlets is much larger than that of large outlets. 2% of India's small outlets are either lost in the Indian Railways or expanded to 6 to 8%. If the highlights are set to be netless, then the next level will automatically jump to 6 to 8%. Obviously, no nets will be A striking white spot. In addition, the level contrast between the dark tone and the high school tone is an important part that Indian Railway workers must consider.

To sum up, the true and credible colors and the complete tonal hue are two important indicators for measuring the quality of graphic and graphic texts. In the printing iron production, in order to ensure the reproduction quality of the graphic and text, we must first understand the specific requirements for the quality of graphic and trademark. Secondly, we must clearly understand the relevant factors affecting the quality of graphic reproduction, and prevent the occurrence of quality deviations from the root. The third is to determine the tone control of the text according to the actual production data specification.

The quality control of the printed iron is a complete system engineering, and the dataization and standardization of the Indian iron production are the basis of this system at any time. The establishment and improvement of the modern printing rail management system is the fundamental way to solve the quality fluctuations of India Iron.