There are 5 types of grooved used for the production of corrugated cardboards. They are identified with the A, B, C, E, K letters.
Single-Sided: Constituted by spreading Kraft or Testliner plain papers on corrugated paper made of Fluting. Used as wrapping package.
E Wave (Micro Wave) : A corrugated cardboard with a groove number of 275 – 310/meter, groove height range of 1,15 mm – 1,65 mm. E wave grooves which are waves are thin; are produced as packages for consumer nondurables and gifts.
B Wave (Thin Wave) : A corrugated cardboard with a groove number of 150 – 184/meter, groove height range of 2,1 mm – 2,9 mm. The B wave, which is more resistible to surface squeezing due to its few groove height and wave distances, has a comparably more suitable surface for printing.
C Wave (Medium Wave) : A corrugated cardboard with a groove number of 120 – 145/meter, groove height range of 3,5 mm – 3,7 mm. The C type exhibits the best bottom and top compressing resistance.
C+B Doppel (Double) : This wave with a height of 6 mm ± 0,5 is constituted by the combination of two waves. Its density, resistance values, protective, and conveying features as a box are quite better than the other waves. Big-sized boxes are usually used extensively as export boxes for heavy foods, goodies, and , plastic boxes, heavy food, goodies and pulse boxes are extensively used as general export boxes for products passing may hands in the distribution channels.
E+B Doppel (Double) : It has a height range of approx. 4,2 mm and 5,8 mm, and its groove number varies between 150 – 184/ meter.
Triplex :It has a height range of approx 7,15 mm and 8,15 mm. It is constituted by plastering the E, B, C waves on the top of the other.