In what way do the contents in a package or carton pose a problem?
A carton’s contents can alter tuning and interfere with the tag’s ability to receive energy from the reader. Certain substances, especially metals and liquids, can often have a dramatic effect on the RF performance of tags. For this reason, these materials are often called “difficult” or “RF-unfriendly.” Aside from de-tuning, these materials can cause other problems like absorption, shielding and reflections.
