From chemical pulp kraft paper is made.

In the kraft process, kraft paper is made up of chemical pulp. Sack paper is high elasticity, porous kraft paper board designed with high tear resistance for packaging items with high strength and longevity requirements. The pulp that is produced by the kraft paper board process is more desirable than that produced by other types of pulping the great kraft paper board with the best designs is given by Thunderbolt paper.