the sheet is nominally 5 7 the first pass ash retention fpar was measured using the ddj the furnish was loaded with additional clay the final clay content was 30 5 the clay was treated with dendrimer prior to addition to the stock the headbox stock consistency was 0 84 after dilution with filtered white water the furnish was heated to 60 u00b0 c and mixed at 500 r p m results in table v indicate that the addition of either of the dendrimers increases fpr two board stocks were obtained from a corrugated medium producer the first stock was 100 old corrugated container occ and the second stock was 50 occ 50 nssc neutral sulfite semi chemical the nssc was produced using spruce chips for this experiment the first pass retention fpr wrv and drainage rate using the electrodes e were measured using the modified d j the stock consistencies were 1 15 for the occ and 1 20 for the 50 occ 50 nssc as received from the mill these stocks were used as is and the consistency was not adjusted the furnish was heated to 60 u00b0 c and mixed at 500 r p m results in table vi indicate a marked improvement in drainage rate for the 100 occ furnish and a slight improvement in wrv and fpr on the other hand the dendrimer only slightly improved the wrv and fpr for the 50 nssc 50 occ stock and was detrimental to the drainage rate the same stocks as in example 6 were used for this experiment the gravity drainage rate was measured using the fddj the stock consistencies were 1 15 for the occ and 1 20 for.