Before customizing food packaging bags, a necessary task is to print the pattern, which is to print the originally designed pattern on the surface of the packaging bag. Currently, the main printing methods used are gravure printing and flexographic printing. Of course, as customers, we do not need to understand the difference between these two types of printing. But generally speaking, packaging bag manufacturers will recommend us to use printing methods that are suitable for ourselves, so everyone still needs to have a simple understanding.
Customized gravure packaging bags are a direct printing method that involves imprinting the ink directly onto the surface of the packaging bag. For flexographic printing, the elastic convex printing plate transfers ink onto the packaging bag. So there are some differences between the two printing methods. Many people choose different colors when printing, and these contents must be highlighted during the design process so that the packaging bag customization manufacturer can know how to spray the image.
Because the food inside the packaging bag needs to avoid squeezing or vibration, when customizing the packaging bag, it is necessary to improve the quality of the packaging bag and not shatter it at a touch. Especially for some health packaging items, if all the air inside is extracted, some desiccants or deoxidizers can be placed inside to ensure that the environment in which the food exists is absolutely oxygen free. Food can be stored for a long time, and vacuum packaging bags can be used within the shelf life range. However, if the time is too long, some gas may be mixed in. In fact, this requires packaging bag customization manufacturers to be very advanced in technology when customizing vacuum packaging bags to improve the sealing of the packaging bags. If their technology is very poor, it is easy to add some unknown gases into the packaging bags, and the packaging bags will lose their durability.