What is the foil used for on the rear of this label?

In summary, the foil on the rear of the label is typically used for various purposes such as enhancing the aesthetic appeal, providing a barrier against moisture and light, and ensuring product integrity. It can also serve to improve print quality and durability, making the label more effective in branding and protection.
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DDTJRAC
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It's an RFID label similar to these:
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  • #3
"Long Distance Passive Alien"... uh-oh! :eek:
 
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