What Colour is ivory black?
Ivory Black is a brown black of moderate tinting strength, recommended for general use. Mars Black is a denser, more neutral black with stronger tinting power. Davy's Gray is a mixing grey, specially formulated for toning down a colour without the dirtying effect caused by adding black.
Why does ivory turn black?
Recognizing Genuine Ivory
Many people rely on the hot needle test for ivory. When touched with a hot needle, genuine ivory chars and turns black; a hot needle will cause artificial material to melt or burn.