using a modified morehouse super 800 series colloid mill the morehouse mill is modified by securing the mill stones as is taught in u s pat no 4 841 623 to rine as described further above tap water was added to the sized reduced material in the hopper which feeds the colloid mill a water and eptfe slurry was produced in the hopper with a concentration of water to eptfe of 50 50 note that the higher the concentration of eptfe to water is made the better the efficiency of the mill although there does exists a peak concentration ratio since too much eptfe to water ratio will result in excessive heat build up on the stones the stone must be kept cool during the milling operation excessive heat build up in the stones will render the stone useless as well as the heat will melt the thermoplastic coating on the eptfe material the preferred water and ptfe concentration is 35 40 ptfe to 65 60 water to allow for adequate cooling of the stones and the coated eptfe material the size reduced material exits the mill as a slurry this slurry material was then placed on flat aluminum pans in a forced air convection oven at a temperature of 150 u00b0 c and remained there until the water evaporated the pans were removed from the oven and the cake.