What is a polymer bag with carbon?
These bags are seldom used anymore, they are made with carbon on some 50% proportion, the intention is to protect from static discharges as it gives a a more-or-less low resistivity, somewhere between 10kΩ and a 10MΩ. The problem with them is they do not allow see-trough and also electronic devices protected gets some carbon dust deposition that may damage some delicate circuitry.
