Ink tags are a form of retail loss prevention that is commonly used in clothing stores. These tags contain glass vials filled with permanent ink and have a thick plastic cover.[1] The tags are attached to the items they protect with a magnetic lock which requires a special tool to remove. When forcibly removed from the item the vials of ink will shatter, releasing the ink and irreparably damaging the fabric. The tags typically have warning labels to discourage tampering. Ink tags fall into the loss prevention category called benefit denial. As the name suggests, an ink tag discourages theft by denying the shoplifter any benefit for their efforts. Ink tags are most effective if used together with another anti-shoplifting system.[2]