The thickest paper is called cardboard - almost every child knows that. But unlike ordinary paper, cardboard consists mainly of plant fibers of large thickness and weight. There are many classifications and, so to speak, boundaries along which the separation of concepts occurs. For example, in Germany cardboard is considered paper, which has a mass exceeding 150g per square meter.

Cardboard is widely used for making DIY crafts. This material has various properties:

- various thickness
- electrical insulating properties
- susceptibility to destruction when exposed to moisture

Modern industry produces a large number of types of cardboard that can satisfy any consumer needs. This material can be produced multilayer, which contributes to its widespread use as packaging. Cardboard can also be used for wall upholstery and the manufacture of billboards or sculptures made do it yourself. Rag, mixed, straw, printing, packaging, building - each type of cardboard is used in the modern world, despite the abundance of materials made of plastic and polyethylene.

Cardboard production is a complex and multi-stage process, which includes the following stages:

- grinding of the source material
- mixing cardboard pulp
- fill in forms
- pressing

Manufacturers have their own special classification of cardboard according to the method of production. It has a number of designations: SBB, SUB, FBB and WLC, which mark the finished product. Cardboard under different abbreviations is distinguished by quality, material used for raw materials, specific gravity and purpose.

You can make a lot of entertaining yourself out of cardboard. craftsthat will be useful in everyday life. For example, everyone can do furniture made of cardboard, quite suitable for the device cottages or even apartments.