A Black Substance That Comes From Burning Wood. What is a black substance that comes out of burning wood? Chimney soot is fine black or dark brown powder formed due to incomplete combustion of wood or coal in a confined place.
Hence it can be correctly referred to as the byproduct of fireplace combustion. Chimney soot is fine black or dark brown powder formed due to incomplete combustion of wood or coal in a confined place. Why do things turn black after.
