Flexible-packaging glossary

Underrun

Finished quantity produced below the amount stated on the purchase order.

Why buyers encounter it

If the buyer cannot accept less than a hard minimum, that constraint should be discussed before production and reflected in the terms.
Printed rollstock web leaving a wound roll
Buyer diagramReference diagram for underrun.

Use the term carefully

This definition helps interpret a packaging conversation. It does not establish a complete film structure, machine setting, regulatory conclusion, shelf-life result, or approval for a particular application.

Research source: PC-005, PC-113. Application-specific details remain subject to manufacturer and technical review.