A soft bulletproof vest can only protect against low-speed bullets. For high-speed bullets or some steel core bullets fired from rifles, it can get bulletproof by inserting hard shields at key positions based on soft bulletproof vests. At present, hard guard armor made from Silicon carbide composite ceramic plates can meet the requirements of proper weight, performance, and price.  Black silicon carbide grain and powder can be raw materials to produce bulletproof armor.

Black silicon carbide is an artificial abrasive material. It can work fantastic for sandblasting, abrasive tools, anti-slip, and heat resistance fields. However, the quality and technical indexes are different because of the different production technologies. Basically, the 98% black silicon carbide and 99% black silicon carbide are both A-grade SiC.

Green silicon carbide grain F30 is a relatively coarse grit for sandblasting. It is suitable for making GC abrasive discs and abrasive wheels. For blasting, F30 green silicon carbide is a normal grit for surface treatment on ceramic, marble, and non-ferrous metals such as copper, titanium alloy, and tungsten carbide.