4th is the lowest layer. To create it, manufacturers take the highest quality cellulose. They use either bleached material or not.
The cardboard, in the structure of which there is only cellulose, known as cellulose. When the basis of cardboard is made from the waste paper, it is called the waste. In some materials, manufacturers use cellulose with very high strength. Thanks to this, the product becomes more rigid, durable and better resists moisture. It is known under the name as “Craft Carton” and is a representative of purely cellulose species that are part of the “high-quality” group.
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