Unbleached kraft paper. Like the previous one, it is made from cellulose, but this time from unbleached cellulose. It is used in the production of paper bags and sacks with high tear resistance. It is also used in the production of 3,5, 7-layer cardboard with very high rigidity and strength parameters. It is also available in thicker version as solid cardboard and even cardboard which is used in furniture and bookbinding industry.