39 s 17 120a catalyst benzene sulfonic acid was added the mix was then stirred until the slight exothermic reaction produced subsided this stirring time was approximately two minutes the mix then had a smooth creamy consistency this mix was spooned into a mold consisting of three plates see fig3 two flat top and bottom plates plates 1 and 2 in fig3 and a middle plate 3 containing a rectangular cut out 4 the cut out was filled with mix then top plate 1 was fastened to the other two plates the entire plate assembly was placed between the 450 u00b0 f 232 u00b0 c platens of a laminating press and the press was closed after five minutes the plates were heated to 450 u00b0 232 u00b0 c and held for a sufficient period of time to harden the part the press was then opened the plates removed and disassembled and a sample was pushed out from the middle plate this process was repeated for two other samples each part was then placed in a vacuum furnace without any other treatments or processing and heated at 10 u00b0 f min to 2300 u00b0 f 1260 u00b0 c the part was held at this temperature for three hours and then cooled to room temperature the average carbon content of the three samples was determined to be 0 42 1 0 fe 3 o 4 five micro m avg.