: The soap helps the dye lift from fibers during washing, though you should always test a small patch of fabric first. 3. "Chemical Cut" (Special Effects)
: Mix Clear Dish Soap (like blue Dawn) with Corn Syrup and Red Food Coloring .
: Add Red Food Dye gradually. Use a tiny drop of Blue or Green Dye to deepen the red into a more realistic, darker venous color.
: Apply a solution of Potassium Thiocyanate to the skin (it will look clear). Trigger : Coat a blunt prop knife in Iron (III) Chloride .
: Add a small amount of Cornstarch to make the liquid less translucent. 2. Washable Costume Blood
Watch these demonstrations to master the texture and color of your fake blood: How to Make Fake Blood YouTube · Denver Center for the Performing Arts