Difference in Corrugated for B Flute and C Flute

Corrugated Cardboard

• Corrugated cardboard consists of two flat liner sheets surrounding a fluted center. You can use it for a virtually limitless number of projects. Often it is made into boxes, which are then used to ship items such as household goods or packages. You can also use it as a packing material or as a brace to hold up something lighter than itself, such as poster board. Because of its relative strength, you can use it as a shim when a stronger material is unavailable. Smaller flutes of cardboard can also be printed upon and make very durable posters. Flute size can vary slightly by manufacturer, but even among manufacturers the specific sizes remain fairly consistent.

B Flute

• B flute corrugated cardboard is categorized as a fine flute, with the flutes of a small height and quite close together. Each flute is 1/8 inch high, and there are 47 flutes per foot. The small distance between flutes makes B flute cardboard more resistant to puncture than other flute sizes. The cardboard is thinner than other flute sizes because of the smaller height of flute, which means that B flute cardboard takes up less space than other types of corrugated cardboard.

C Flute

• C flute corrugated cardboard is categorized as a medium flute, with the flutes being of a greater height and farther apart than B flute cardboard. Each flute is 11/64 inch high, and there are 41 flutes per foot. The larger flutes make this cardboard more durable. Boxes used for moving and shipping are frequently made of C flute cardboard.

Double-Wall Construction

• Sometimes a project will call for extremely strong and durable cardboard. In these cases you may use double-wall construction cardboard. Any two flutes of cardboard can be combined and layered to form a double wall construction, or even two layers of the same flute. A common combination is one layer of B flute and one layer of C flute. Manufacturers will fuse together one layer of B flute cardboard and one layer of C flute cardboard in order to obtain the strongest cardboard possible. The strength of the C flute cardboard combines with the puncture-resistant B flute cardboard to form an extremely durable material.