How to Make Stage Blood
Desired Amount   1 Pint 1 Quart 2 Quarts 3 Quarts 1 Gallon

Water

  1 oz 2 oz 4 oz 6 oz 8 oz
Zinc Oxide/Corn Starch   1/2 tbsp 1 tbsp 2 tbsp 3 tbsp 4 tbsp
White Corn Syrup   1 pint 1 quart 2 quarts 3 quarts 1 gallon
Red Food Coloring   1 oz 2 oz 4 oz 6 oz 8 oz
Yellow Food Coloring   2 1/2 tbsp 5 tbsp 1 oz + 4 tbsp 2 1/2 oz 3 oz + 2 tbsp
Blue or Green Food Coloring   2 - 3 drops 3 - 5 drops 6 - 10 drops 9 - 15 drops 12 - 20 drops
Kodak Photo Flo   1 oz 2 oz 4 oz 6 o 8 oz

Note:
(1) -- If you are NOT using Ehler's brand yellow,use only ONE HALF the amount indicated.
(2) -- Only use the Photo-Flo (a wetting agent which makes the blood flow and soak into fabric better) if you are NOT going to use the blood in the mouth.

MIXING PROCEDURE
Put the zinc oxide/cornstarch into a bowl, add an equal amount of water and stir into a paste. Add the food color and stir, then add a little of the corn syrup and mix well. Pour into a container that holds more than the final amount (you have to mix before using as it may separate), add the remaining corn syrup and mix well, then add the amount of water specified and mix again. This will give you blood with normal consistency.

The blood may look too bright when used on white materials; if you need to darken it add about 3 to5 drops of green or blue coloring per quart to darken.

If you want to thin it for pumping, make it up with the Photo-Flo, but dilute the corn syrup with an equal amount of water before you mix in the rest of the ingredients. For thicker blood, add small amounts of smooth peanut butter (experiment with the amount until you get the thickness you want). Keep the blood refrigerated when not in use or it will grow mould and be wasted; mix it up before use.

Although this formula usually washes off of clothes and skin with no trouble, certain fabrics may stain so test them first and/or use old clothing that you won't mind ruining.

Created by Dick Smith and provided by Brian Oberquell of The Wizard's Den SPFX Studio. Check out Brian's page at The Wizard's Den