Why buyers encounter it
Because the ink is exposed, the ink system, treatment, coating, rub expectations, seal areas, and end use need review.
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-013, PC-022, PC-108. Application-specific details remain subject to manufacturer and technical review.