About corrugated board

Corrugated board sandwiches a fluted medium between liner sheets. The wave geometry multiplies stacking strength while staying light — the foundation of modern shipping packaging.

Structure

Two primary components: liner (flat kraft faces) and medium (the fluted wave bonded to the liner). Single-wall, double-wall, and specialty builds change crush resistance and print quality.

Paper grades & colors

• CA — Brown-grey inner board — not print-focused
• KA — Golden brown — common postal / cold-chain fruit cartons
• KI — Egg-shell brown — natural tone, strong dark print
• KL — Earth-tone premium, eco positioning
• KS — White face — smooth, clean print surface
• KT — Deep natural brown

Flute types

• Flute A — High stacking load; less print-critical
• Flute B — Self-supporting goods (e.g. steel cans)
• Flute C — Most popular mid-weight general goods
• Flute E — Best print surface; small die-cut / offset
• Flute BC — Heavy goods, tall multi-layer stacks