when the pressure drops to 19 6 bars more c 2 f 4 is added until 21 6 bars are reached again and so on repeatedly until a dispersion is obtained whose polytetrafluoroethylene concentration reaches 25 to 30 by weight during the course of polymerization some lic 8 f 17 so 3 emulsifier is readded several times until a final concentration of 0 244 based on the water is reached this dispersion is divided into several parts one remaining untreated as the reference control while the others are respectively treated with an aqueous solution of k 2 co 3 naoh koh nano 3 or na 2 coo 2 added with slight agitation after homogenization the different sample portions are coagulated drained as by centrifugation or vacuum filtration and dried for 15 hours at 160 u00b0 c tubing and tape were formed as previously described and after fritting for about 3 minutes at 410 u00b0 c for the tubing and for 30 minutes at 380 u00b0 c for the rolled up tape the finished products have the appearance listed in the table i which follows table i______________________________________ by weight ofelectrolyte in appearance of the finishedrelation to the productelectrolyte weight of ptfe 8 u00d7 10 pipe rolled up tape______________________________________k sub 2 co sub 3 0 4 white white very few bubblesnaoh 1 white white.