Large jar with 250 ml matte black paint with really high opacity. Paint recreates it traditional blackboard, fool it painted on one surface, past, the laws can then subscribed on with blackboard chalk paint booklets on avenue types surfaces wood, metal, concrete, clay, plastic, cardboard etc.. Past, the laws applied best with one roll. Measurement drying time varies depending of it type surface, it applied. Fool color is dry, becomes it permanent.