In the screen printing industry, the often overlooked aspect is the consistency of the printing materials to be printed. Paper, cardboard, and plastics used in printing are generally produced in batches. A high-quality supplier can guarantee that the entire batch of materials they provide has a good surface smoothness, but this is not always the case. Any slight change in the process during the processing of these materials will change the color of the material and Surface finish. Once this happens, the color of the print will look different, although nothing has changed in the actual printing process. When we want to print the same graphic as a promotional advertisement from a variety of materials, such as corrugated plastic panels and fine art paperboard, the printer will encounter these practical difficulties. Another problem that is also often encountered is that our screen printing has to catch up with offset images. If we do not pay attention to process control, we have no chance. Careful process controls include accurate color measurements, the use of a spectrophotometer to measure line color, and densitometers to determine the three primary colors so that we can print consistent color images on a variety of materials. If we also use the traditional intuitive method, the color change may be so large that the process is completely out of control.
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