Antistatic bag

Black bags also exist, wherein the polyethylene is manufactured containing trace amounts of carbon, forming a partial shield, though not a complete one.

These bags are preferred for more sensitive parts, but they also see use in environments where sparks would be hazardous, such as oxygen-rich areas in aircraft and hospitals.

[4] Metalized bags are more fragile than their nonmetal counterparts, however, as any puncture compromises the integrity of the shield.

In addition, they have a limited shelf life, as the metal substrate can deteriorate over time.

[6] These bags are often gray or silver owing to the metal layer, while still being transparent to some degree.