








is a thin cardboard used for the flat facing of the corrugated board.
is a sheet of paper that has passed through a corrugating machine to give it wavy ridges called flutes.
Generally,larger flutes have greater strength, and has better resistance to impacts, while smaller flutes are more suitable forquality printing and can be formed and folded more precisely. The flute type can be chosen depending on the usage and requirements of the users.
Type | Height (mm) |
Number of flutes/ft |
Characteristics |
---|---|---|---|
A | 4.0 ‐ 4.8 | 36 | Excellent for compression and cushioning with good stacking strength, but does not enhance printing. |
B | 2.1 ‐ 3.0 | 49 | Suitable for products that can support the stacking weight on its own, such as cans. |
C | 3.2 – 3.9 | 41 | Most common flute used for general products that can support medium weight. |
E | 1.0 – 1.8 | 95 | Best for quality printing, suitable for small die cut or offset boxes. |
Properties | B | C | E |
---|---|---|---|
• Stacking | Average | Good | Poor |
• Printing quality | Good | Average | Very Good |
• Slitting | Good | Average | Very Good |
• Puncture resistance | Average | Very Good | Poor |
• Stocking | Average | Average | Poor |
• Scoring | Good | Average | Very Good |
• Impact and vibration resistance | Average | Good | Poor |
• Bursting resistance | Good | Average | Average |