Cardboard is the thickest paper material that can be up to 4 mm thick. It consists of alternately arranged and glued layers of liners - flat and wavy. Corrugated cardboard can have two, three, four, five, seven or nine such layers. We use it to produce packages with different properties - they are determined by the height of the waves, among which we distinguish:

The use of corrugated board with the following waves is also encountered: D, K, A, G, N, O. One of the most important features of the above waves are (next to the height of the wave) the scale of the wave and the wave modulus. At Prost-Key, we use microwave F. for the production of packaging. As much as 50% of the materials needed to make it come from recycling, and the packaging made from it can also be processed.

The higher the wave, the stiffer cardboard will be used, for example, for the production of cartons intended for product protection. However, cardboard with a lower wave is characterized by resistance to crushing and puncture, therefore it will be a great material for the production of packaging that requires printing. This type of cardboard can also be used as a pack filler, and its significant advantage over bubble wrap is biodegradability.

Solid board is available in versions up to 11 mm thick and thus gains 1 place among stationery when it comes to thickness. At Prost-Key, we use recycled cardboard, so the material is environmentally friendly. Most often it is used in the production of packaging.