Blood Powder should be applied thinly and uniformly to the required, dry section of the actors skin. It can be applied best by a powder puff or powder brush. Instant Blood Powder applied in this way is virtually invisible until this point in time. The object intended to inflict the simulated wound is then coated with a wet medium: for example, diluted transparent jelly or glycerin diluted with water. This object is then placed in contact with the area of the skin covered with Blood Powder. A trickle of artificial blood will then immediately appear, with the amount depending on the amount of moisture applied. Blood Powder is manufactured with soluble coloring matter and cannot be removed from textile fabrics. It can be removed from some surfaces only with difficulty. In order to prevent staining of the actors skin, Blood Powder should be applied to skin that has been first provided with a protective shield of greasepaint.