If you have ever seen a 'blacked out' tooth it's most likely Kryolan. Apply to a dry tooth to create your desired effect. Try using two colours together to create a more realistic look. Maybe nicotine around the gum-line and in-between teeth and try the black tooth enamel on the edge of a tooth to make it appear broken.
This product is flammable and requires special shipping and may attract an additional surcharge please contact store for more information.