The problem of the printing process is worth paying attention to

First, the printing effect is not in line with the original

The printing process is a perfect combination of art and technology. For textile printed fabrics, it is first of all to see whether the printing effect is in line with the original spirit. In particular, whether the color of the main flower, the level of each color, and the relationship with each other are in compliance with the requirements of the customer, whether there is any leakage or missed printing, or whether there is a problem with defective joints. The biggest difference between printing and dyeing is that the printed fabric is difficult to be repaired. Once the customer rejects it, the consequences are very serious. The economic losses of the printing and dyeing factories and traders will be great. Therefore, printing and dyeing factories and traders attach great importance to this link. Sometimes, in order to ensure safety, the factory requires the customer's follow-up personnel to go to the scene to perform “front-to-side coloring”. As we all know, several dozens of samples can be used to ensure that the samples will be selected. However, multiple proofing will affect the production efficiency and cost of printing and dyeing plants. Therefore, the quality requirement for the coloring technicians and machine operators in the printing shop is relatively high. It is required to reduce the number and time of large-scale proofing as much as possible. In short, it is necessary to find the best balance between quality and efficiency to ensure that the printed products meet the requirements of the end customer.

Second, the slant or flower oblique

This can be a serious problem of batch size. The key is to require the printing shop to strengthen the inspection of the pre-press semi-finished products. The most important and most safe way to find problems before printing is to increase the number of full-width weaving processes before printing to ensure the quality of the final product. This is crucial for printed geometric patterns (such as checkerboard patterns), twill trousers, or stretch fabrics. Once it is not well grasped, it will be more difficult to remedy the problems in the post-process. It is also necessary for the merchandisers of traders to remind the relevant personnel of the factory to pay attention to this point and avoid the loss caused by the batch.

Third, the printing process easy to produce defects

Printing machine will inevitably produce different prints in the printing process, such as inaccurate flower (or missing white or third color), color point, missing print, color transfer, screen printing, white spot, jump knife, color , edge color difference and so on. This requires the printing guards and printers to strictly control the quality of the printing machine and to find out the problems at the first time. At the same time, we must also take off the machine to do steaming and washing to see if the entire printing effect and each color are in compliance with the original requirements. We must pay special attention to defects that cannot be repetitive in regularity and continuity.

Only by strengthening the quality of the process can ensure the quality of the final product. For some of the less serious small prints, such as the small white flowers, white spots, etc., which are not allowed to be caused by flowers, it is also possible to take measures such as manual coloring after printing to make up for it. This is also a common practice in printing and dyeing factories.

Fourth, after the printing process easy to produce defects

Post-printing steaming and washing processes can also create defects. Steaming process conditions (including steaming temperature, humidity, and time) are critical to the color development and fixation of the ink. If it is not well known, it will affect the shade of the fabric and the color difference between the front and back sides and the color difference at the edges. It may also result in poor color fastness. The problem of compliance; Washing and soaping process is also very important for removing floating color, ie, unfixed dye. Only by removing the floating color on the surface of the fabric can we get the proper color and ensure the fastness of the printed product. In addition, these two processes may also produce water spots, wrinkles, breakages and wefts, which will affect the quality of the final product.

V. After finishing the possible defects

After the finishing process will also produce rickets, affect the quality of the final printed cloth, in particular, some geometric patterns of the pattern after tenter and anti-shrinking after finishing the size of the pattern changes, such as a circle into an oval, the square becomes Rectangle or grid spacing does not meet the requirements, etc., should pay special attention. This problem must be considered in the process design of the entire process of the various processes, and take appropriate measures to avoid the final process to find problems and then remedial difficulty is relatively large.

White and light-colored printed cloth should pay attention to whether there are color spots and stains caused by poor cleaning of the machine, and the post-finishing should pay attention to the whiteness of the background of the printed cloth and the pH value of the cloth surface, which is also a matter of concern.