Creating realistic "Blood HD" (high-definition fake blood) depends on whether you need it to be edible (for mouth work) or washable (for costumes). Here is how to prepare professional-quality fake blood using common ingredients: 1. Edible "Cinema" Blood
For a magic-like effect where a "cut" appears instantly on the skin:
: Apply a solution of Potassium Thiocyanate to the skin (it will look clear). Trigger : Coat a blunt prop knife in Iron (III) Chloride . BloodHD
: Mix Clear Dish Soap (like blue Dawn) with Corn Syrup and Red Food Coloring .
: 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) Trigger : Coat a blunt prop knife in Iron (III) Chloride
Use this if you are applying blood to fabrics and want to minimize permanent staining.
: 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. BloodHD
: Start with Corn Syrup as your primary thickening agent.