SEVERAL COMMON PROBLEMS IN SUBLIMATION PROCESS (1)
Here are several common sublimation problems and the ways to minimize them to help users to get rid of time-and-material costs.
Being the most common problem among all digital inkjet printing systems, banding refers to lines of missing ink on the printout. It happens most often due to clogged print head nozzles and naturally streaks of missing ink on the printout. If ink dries inside the print heads, consequently, banding occurs in prints.
If you are regularly printing, even one day in a week, you probably will not have any banding issues. Some suppliers suggest daily maintenance to their users. The best way to deal with this is to run the printer machine to prevent the ink from drying up. You can run a small quantity of ink through the heads on a routine basis by using the head cleaning function of the printer. In the case of some printers, this is done automatically. On the other hand, you will need to perform a manual head cleaning for other printers.
If you’re having an issue with banding, it may have some other causes besides just clogged heads, such as running out of ink. In that case, make sure that you still have plenty of ink in your machine.
Transfer paper and substrate are two key materials to get optimum results in sublimation. If the paper shifts or is not firmly planted against the heat press or the inks is not dry during the pressing, then the result will be ghosting. Ghosting is when the print ends up with a blurry image and an image like shadow. When ghosting occurs, all printing efforts of manufacturers are gone in vain and obviously it will add burden in terms of time and cost. To prevent this, make sure that there is tight fit between transfer paper and the substrate and ink is dry.
Although some users manufacturing short run productions or use a minimal amount of tape to secure the transfer to the product, of course, it will not be a good solution since the tape used can leave a mark. Ideally, Transfer papers especially used for wide format printing should adhere to the substrate. The transfer will be lifted off the surface, quickly and cleanly. Alternatively, transfer paper is firmly sticked to the substrate and does not slide along the surface of the substrate, preventing ink overflow and yielding best results without any ghosting problem.