Flute type and Board Grade Customisation

At Forests, we’re able to customise a combination of flute type, board grade and cardboard thicknesses to suit your individual application. The flute is the height of the corrugation, sandwiched between two liners. The most common flute type used in slotted containers is C flute thickness. It is approximately 4mm thick and has excellent stacking strength. Another common flute type is B. It is mainly used in die-cut applications, has slightly lower stacking strength but good printing properties due to the higher number of flute than C Flute, and is approximately 3mm thick. When we combine both B and C Flute together, we form a product known as twin cushion, otherwise recognised as double wall. This is generally about 7mm thick, the combination is used for heavy products or those requiring extra cushioning in transport. We also produce E Flute cardboard that’s approximately 2mm thick. E Flute board can either be used on its own or together with B Flute, creating an EB twin cushion. E Flute is used by itself for those applications requiring a smoother print finish, when combined with B Flute the combinations provides a significant improvement in board strength and stiffness, with a minimal addition in thickness approximately 5mm thick. All materials manufactured can be produced in both a white or brown natural material.

Please speak to one of our sales people if you are uncertain of the material required.