... purity, 2.high density, 3.high strength. High purity graphite material GL-23 using cold-molded, fine roasting, duplicate impregnation and ... is a high purity, high strength, high density graphite material.For this graphite material with thermal stability, high temperature resistance, corrosion resistance and ... according to your requirement. Cold-molded Fine-grained Purity Graphite Material Cylinder