The IMD process is a mainstream process structure for mobile phone cases, which is simply summarized as printing the pattern onto a dedicated film, using a mirror image method to print the pattern to the bottom, so that the correct pattern can be seen on the surface and the color of the pattern will not fade due to daily use friction. Higher quality sheets can achieve a familiar feel (frosted texture) on the surface of the pattern. The second printing method uses a modified Epson digital printing machine to print special pigments onto the sheet. This is different from our traditional digital color painting process, because its accuracy can reach the photo level. However, the other problem is that the special pigments are not original ink, so the curve can cause a small difference in the color of each digital printing machine. If there is a high requirement for color sensitivity, Scheme I must be adopted, However, for orders with a small initial order volume, Epson digital printing machines are generally used for printing. As you can see, the wholesale market procurement of IMD phone cases is basically Scheme 2, while the large machines in Scheme 1 are only suitable for large enterprise procurement or foreign trade orders,. The second mold has a stable shape, that is, it will not appear distorted shape. In the production process of injection molding machines in some low-cost OEM factories, workers pay wages according to the quantity, so they often fail to pay attention to whether the products are qualified when they are taken out, resulting in some edge deformation or overall deformation products being delivered directly, and the defective rate being directly borne by customers. Friends who have made imd orders know that you place an order of 500, and sometimes the factory will give you 490, "Or 510, which is because the factory will increase the quantity before production, and at that time, 490 proved that his batch of orders had too much deformation and loss to meet the demand of 500 orders, while 510 orders were due to the stability of this batch of orders and basically qualified delivery.",. Basically, the above three aspects can meet the requirements, depending on the comparison of the prices of processed products. Some factories quote higher prices because of the relatively high costs of their factories, such as the quality of sheet materials, TPU material quality, and mold cost quality. As previously mentioned in an article, mold starts with more than 10000 molds, which does not exclude the production of thousands of molds. This is also a cost difference, and the quality of sheet materials can also have a double price difference, TPU materials, not to mention, are not a price range for new materials and mixed second-hand materials. This cost difference estimate is also suitable for comparison with other mobile phone shell products. This can also be analyzed in the following article when available.