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Corrugated boards
E–flute – Flute profile 1,6-2 mm (called also MICRO-wave)
D–flute – Flute profile ca. 2,3 mm
B–flute – Flute profile ca. 3 mm
C–flute – Flute profile ca. 4 mm
EB–double-wall – Flute profile ca. 4,5 mm
EC–double-wall – Corrugated board composed by 5 layers, as follow: one E flute + one B flute + three paper layers (the flutes are invisible on both sides)
CB–double-wall – Flute profile ca. 7 mm
At the simple-wall B or C flute, the flute could be seen at one side; for this reason it’s better to us the double-wall EB flute, because the surfaces are smooth
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The structure of the corrugated boards
