The situation is somewhat different if RMP, TMP, CMP or CTMP (the so—called “mechanical” bagasse pulpsl is to be produced from bagasse that has been stored for a considerable length of time. To maintain the desired opacity. Peroxide bleaching is required for these pulps. However, the stored bagasse may darken to the point where peroxide bleaching will no longer brighten the "mechanical" bagasse pulps to acceptable levels of brightness.