in a newsprint pulp sample of 85 ctmp pulp and 15 kraft pulp the comparison was done with 0 045 to 0 05 polyethylene oxide by weight of the pulp furnish the reichold bb 139 phenol formaldehyde resin is included for comparison table 4__________________________________________________________________________comparison of high and low molecular weightpolyparavinyl phenol per cent fines retentionmaruzen maruzen maruzen maruzen reichold reicholdgrade s 2 grade s 2 grade h 2 grade h 2 bb 139 bb 139ratio of ratio of ratio of phenolic fines phenolic fines phenolic finespeo retention peo retention peo retention__________________________________________________________________________0 51 58 56 0 51 60 58 0 5 30 871 0 75 73 1 0 77 71 1 0 50 651 5 74 70 1 51 77 41 1 49 54 422 0 75 25 2 0 73 76 3 01 60 33 3 01 56 97 3 98 43 06 3 98 52 17 __________________________________________________________________________ the data shows that at low ratios of poly paravinyl phenol to peo there is an advantage for the higher molecular weight material for fines retention table 5__________________________________________________________________________comparison of high and low molecular weightpolyparavinyl phenol drainage time to 100 ml maruzen maruzen maruzen maruzen reichold reicholdgrade s 2 grade s 2 grade h 2 grade h 2 bb 139 bb 139ratio of drainage ratio of drainage ratio.