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Is it necessary to apply crystal glue after heat shrinking is completed?

After the heat-shrinkable film is finished, it is best to drop some glue. Crystal glue is dripped on the surface of the heat-shrinkable film to prevent the heat-shrinkable film from fading or being scratched by sharp objects and affecting its appearance. But if you find it troublesome, you don’t have to do it, but you have to be more careful about saving it. You don’t want to see your work being worn, right?