Cartons
Understanding 3-Ply, 5-Ply and 7-Ply Cartons
What the ply count means and the typical uses of each construction.
3-ply
One fluted layer between two liners (single wall). Commonly used for lighter products, retail shipping and e-commerce.
5-ply
Two fluted layers (double wall). Commonly used for heavier products and when cartons are stacked.
7-ply
Three fluted layers (triple wall). Used for very heavy items, bulk goods and some export applications.
Important note
Ply count alone does not define strength — paper grade, GSM and flute profile matter as much. Always confirm the full board specification.
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