Why does the same engraving film have continuous color engraving?

Why do some of the same engraving films have continuous color engraving? Why do some of the same engraving films have continuous color engraving? To be specific, the same product even has the same parameter setting for carving, some colors are very good for carving, and some colors are carved continuously. Today, the editor will tell you why the lettering film appears in the engraving. The first reason why some colors of the same lettering film are engraved is that the toughness of hot-melt adhesive is different. The second reason is that the thickness of the material is not uniform. Some special effects like fluorescence need to be coated with an extra layer of glue. Another reason is that the base material is loose from the mold. Of course, the problem of oven temperature in the workshop is not ruled out. Why do some colors of the same engraving film continue to talk about so many problems? How to solve them? You can readjust the tool pressing scale for each color. It’s 60 degrees and 45 degrees on the market. Why does the same type of lettering film have continuous color engraving? The second is that the adhesive type lettering film is suggested to be cut by laser or marking machine.