Ask any packaging engineer and they will tell you the same thing: the box structure is decided before the design. Here is a practical comparison of the three board types used in most custom packaging projects.
Grey board (rigid boxes)
Solid recycled board, 1–3 mm thick, wrapped in a printed paper face.
- Stiffness — highest; holds shape even when empty.
- Feel — premium, weighty; the “gift box” experience.
- Best for — jewelry boxes, gift boxes, luxury cosmetics, electronics with a premium shelf presence.
- Cost — higher; largely manual assembly keeps the price up.
Corrugated board (shipping & e-commerce)
Fluted core between two liners — the classic brown shipping box, also available printed.
- Stiffness per weight — excellent; strong while light.
- Best for — shipping cartons, mail-order boxes, protective outer packaging.
- Cost — lowest per unit; automated lines keep it cheap.
Paperboard / C1S (folded boxes)
Single-layer printed board, folded and glued — the standard color box.
- Stiffness — moderate; depends on caliper (thickness).
- Best for — retail boxes that ship flat and pop open, hang tags, cartons of cartons.
- Cost — low to medium; highly automated.
A quick decision table
| Your need | Recommended structure |
|---|---|
| Luxury retail experience | Grey board rigid box |
| Durable shipping / logistics | Corrugated carton |
| Cost-efficient retail display | Folded paperboard color box |
| Hybrid (rigid look, shipping safe) | Rigid box + corrugated sleeve |
The engineering trade-off
Weight is the hidden variable. A rigid box feels premium partly because it is heavy — but freight is charged by weight and volume. If your order ships by air, the volume-based charge of a rigid box may surprise you. Discuss the “shelf versus freight” trade-off with your supplier before locking the structure.
Placeholder post — replace with real structural case examples.