From https://en.wikipedia.org/wiki/Carbon_black https://en.wikipedia.org/wiki/Carbon_black > Carbon black (with subtypes acetylene black, channel black, furnac

From https://en.wikipedia.org/wiki/Carbon_black https://en.wikipedia.org/wiki/Carbon_black > Carbon black (with subtypes acetylene black, channel black, furnace black, lamp black and thermal black) is a material produced by the incomplete combustion of coal tar, vegetable matter, or petroleum products, including fuel oil, fluid catalytic cracking tar, and ethylene cracking in a limited supply of air. "Carbon black" refers to both types, but "carbon black oil" is referencing the petroleum derived one which is not allowed to be used in foods as far as I know.