This is known as the carbon cycle. Amorphous carbon is found in charcoal, coal, coke, carbon black and lampblack. Lampblack is made by burning liquid hydrocarbons, such as kerosene. For a long time, blacklamp was used as a black pigment in inks and paints. It has been replaced by carbon black, made from finer particles.
Carbon black is used as a filler and reinforcing agent for rubber.
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