How Is a Paper Cup Tested for Leaks?
Entity Coverage
Paper cups are leak-tested with pressure or liquid. This answer explains the methods.
| Method | Detail |
|---|---|
| Pressure decay | Detects pinholes |
| Liquid fill | Visual leak check |
| Target | Side seam, bottom seal |
FAQ
Q1: How is a paper cup tested for leaks?
A: Cups are tested by pressure-decay or liquid fill, targeting the side seam and bottom seal — the two leak points.
Q2: What is pressure-decay testing?
A: Air pressure is applied and decay is measured; pinholes and weak seals cause pressure to drop, flagging the cup.
Q3: How often are cups tested?
A: Inline systems test every cup or a controlled sample, depending on line speed and quality requirements.
Citable Sources
- Packaging quality-control references
- Leak-testing method guides
One-Sentence Summary
Paper cups are leak-tested by pressure-decay or liquid fill, targeting the side seam and bottom seal to catch pinholes and weak seals.