particle size this specific handsheet composition has consistently exhibited self extinction during earlier handsheet and smoking studies reagent addition mode ph viscosity static burning rate and static sidestream particulate delivery rate are shown below the stoichiometrically exact number of chemical equivalents for both reagents was added for each experiment with only the mode of reagent addition being varied __________________________________________________________________________ sidestream static particulate slurry burning deliveryhandsheet slurry viscosity rate ratedesignation reagent addition mode ph cps mg min mg min __________________________________________________________________________vbr 6535 1b add naoh to mg oac sub 2 11 26 960 se sevbr 6535 2b add mg oac sub 2 to naoh 9 55 380 se sevbr 6535 3b naoh and mg oac sub 2 added 10 05 25 36 1 0 56 together at equal ratevbr 6535 4b naoh and mg oac sub 2 added 10 0 40 se se together at equal rate cold 5 u00b0 c vbr 6535 7b add naoh and mg oac sub 2 9 82 520 se se together with mg oac sub 2 added 10 fastervbr 6535 8b add naoh and mg oac sub 2 9 67 200 se se together with naoh added 10 fastervbr 6536 10b naoh and mg oac sub 2 9 50 90 140 90 se se added together 9 82 10 375 10 90 naoh added then final 10 naoh addedvbr 6535 11b naoh and mg oac sub 2 11 73 90 100 90 se se added together 9 68 10 80 10 90 mg oac sub 2 added then final 10 mg oac sub 2 added__________________________________________________________________________ handsheet specifications 45 g m sup 2 basis weight 40 total filler 90 flax 10 wood pulp fiber furnish treated with 8 solution of potassium acetate burning.