Materials
Corrugated board
Corrugated board combines one or more fluted paper layers with flat liners to create a lightweight structural sheet.
What it means in packaging
The flute profile, liner papers and number of walls affect thickness and performance. A flute letter alone does not specify the complete board grade or prove that a box will protect a particular shipment.
A practical example
An e-commerce mailer may use a fine flute for a compact fold, while a heavier shipping case needs a different board specification.
What to check
Choose board from product weight, handling and testing requirements, then verify the finished pack with its contents.