Beating was included as a variable in the investigations of the
treated OCC pulps. The beating studies were conducted in a PFI mill. Target freeness levels of 420 (control sample, without beating),
400, and 320 mL CSF were used, and TAPPI Standard T 248
sp-00 was followed. The amount of pulp sample taken for each
run was 20 g (oven-dried basis) at 10% consistency, and no load
power was applied. After beating, the pulps were disintegrated at
10,000 rpm for 5 min and then diluted to 0.3% consistency at
20 C prior to making handsheets.