We don't have synonyms for carbon blacks yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are carbon black.
(n) :
(petrochemistry) A fine black powder of amorphous carbon manufactured by the incomplete combustion of natural gas or oil, and used as a pigment in the manufacture of ink and paint. Used as a filler in rubber and rubber-like polymers, it helps prevent deterioration by ultraviolet rays.
(n) :
(petrochemistry) A fine black powder of amorphous carbon manufactured by the incomplete combustion of natural gas or oil, and used as a pigment in the manufacture of ink and paint. Used as a filler in rubber and rubber-like polymers, it helps prevent deterioration by ultraviolet rays.