Basic corrugated cardboard is made of 3 layers: one
corrugated and two flat layers.
Cardboard strength changes by changing the material of
papers.
The height of the corrugated layer is different
Flute designation | Flutes per linear foot | Flute thickness (in) | Flutes per linear meter | Flute thickness (mm) |
---|---|---|---|---|
A flute | 33 +/− 3 | 3⁄16 | 108 +/− 10 | 4.8 |
B flute | 47 +/− 3 | 1⁄8 | 154 +/− 10 | 3.2 |
C flute | 39 +/− 3 | 5⁄32 | 128 +/− 10 | 4.0 |
E flute | 90 +/− 4 | 1⁄16 | 295 +/− 13 | 1.6 |
F flute | 125 +/− 4 | 1⁄32 | 420 +/− 13 | 0.8 |