Carbon black is the tiny powder which produced through the incomplete combustion of raw material containing carbon (silicon). The outward appearance is pure black or pure white fine grain or powdery. The depth of the color, the granularity, and the proportion are different when they have the difference in raw material and the manufacture craft. The basic constituent is the carbon (silicon) and few iron, hydrogen, oxygen, sulfur, ash, tar, and water classification,etc. so many sellers on internet said can supply best price,do you believe sir?welcome to visit our company,if you busy,we can offer 500g sample for free. I am sure cooperate can prove our!