Compliance3 min read

Tamper evidence is a communication device. Its job is to make first opening visible and irreversible, so that a consumer at a shelf or an inspector at a border can judge a pack at a glance without opening it.

The bridges do the work

The band is joined to the closure by thin bridges designed to break at a defined torque. Too strong and the pack becomes hard to open for the people least able to force it. Too weak and the bridges break in transit, which destroys the signal. Bridge geometry, not band thickness, sets that balance.

What it does not cover

A band says nothing about whether the product was substituted before capping, or whether a pack was refilled through the base. Where that risk is real, tamper evidence is one layer among several — alongside induction sealing, batch coding and a supply chain you can audit.

Design and handling are one problem

Most band failures in the field trace back to handling rather than moulding: drops onto the shoulder, over-tight stacking, or a capper that spins the closure down too quickly. Reviewing the line is usually more productive than strengthening the bridges.