The cardboard is a unique invention after the invention of the paper which changed the entire human civilization. The cardboard is a more robust form of paper, or rather heavy duty paper. A cardboard is made by combining different layers of papers together. They are mostly used in different heavy duty works such as packaging of goods and different other works such as binding of books and developing plying cards, sales stands, postcards and other things such as scrap booking.
There are several forms of cardboards which is available in the market. The thickness of a cardboard starts from 2.25 mm and it might increase depending on the demand of the customer.

The density of the different types of cardboards varies on the basis of the products. For example a folding carton will need different density of cardboard than the cardboard to be used in to manufacture setup boxes. With time this product or the corrugated boards has changed its properties and dimension (sjokkselger trykkeri). The cardboard types can be categorized on the basis of layers used to construct it. Cardboard types can be divided into five types of cardboards, starting from single layer to 5 layer cardboards. Cardboards are extremely light weight and can it can reused as it is biodegradable.

On these cardboard types, the basic difference lies with the number of layers which is used to confirm the strength of the paper or the cardboard. (trykhuset trykkeri) The three layer corrugated sheets have a number of layers to protect the inner layer of the paper. In a five layer it will increase more and will enhance the strength and durability of the corrugated board. These layers protect the product and keeps the upper layer free for numbering or decoration.

Painotalo Tryckeri Trykkeri Trykkeri Drukkerij Print House Trükikoda