Tests have been conducted for paperboard from waste paper. The concentrations by weight of waste paper was 0.5%, O. 7%, 1% and 2%. The board obtained was tested for tensile strength. The results indicate that the yield strength decreases with the pulp concentration whereas rupture length erratic behavior.

Tests have been conducted for paperboard from waste paper. The concentrations by weight of waste paper was 0.5%, O. 7%, 1% and 2%. The board obtained was tested for tensile strength. The results indicate that the yield strength decreases with the pulp concentration whereas rupture length erratic behavior.