PaperMaterial
Kraft vs Test liner
Virgin Kraft outperforms recycled Test in strength and moisture, at higher cost and CO₂.
Paper Library
7 minintermediate·Updated 2026-05-30
Overview
Liners give the corrugated board its faces. Kraft (virgin) uses long softwood fibers producing higher tensile and burst strength. Test (recycled) uses mostly recovered paper — cheaper and greener in CO₂, but with shorter fibers and lower wet resistance.
Comparison
| Property | Kraft | Test |
|---|---|---|
| Fiber | Virgin softwood | Recycled |
| Burst | High | Medium |
| Cost | Higher | Lower |
| Moisture | Better | Weaker |
Applications
- Kraft: export, cold chain, heavy loads
- Test: domestic, dry, high-volume
Common mistakes
- Choosing Test for humid warehouses without moisture control
- Assuming Kraft always looks premium — surface still needs coating for HQ print
AI Summary
Kraft = long virgin fibers, brown, strong, moisture-tolerant. Test = recycled fibers, cheaper, lower strength, sensitive to humidity. Blend choice is driven by target ECT, print requirement and sustainability policy.