Critical Logistics

Qline tamper evident envelopes offer reliable protection with built-in security features that instantly highlight any tampering attempt. These envelopes are designed to maintain the integrity of the contents by providing clear and irreversible evidence if opened.

Constructed from co-extruded polyethylene material, the envelopes come with a black inside layer for privacy and a white outside layer for easy handling, along with transparent variants. A strong hot-melt adhesive strip ensures fast sealing and creates a permanent closure.

The envelopes include a security VOID seal that activates when tampering is attempted. Once sealed, they cannot be opened normally, and any forced opening leaves visible VOID marks, confirming that the envelope has been accessed.