How to make fake blood.

With Halloween fast approaching and knowing the job that pays the bills will run out of film blood ‘A’ and film blood ‘B’ before the big night. here are some of the recipes we use to make fake blood.
But  firstly the, most frequently ask question I get asked is;
Q.
Which one looks more realistic blood.
A.
And that would be film blood B as it is black red, while film blood A is bright red, (or as we call it hammer horror film blood)

Most professional-quality fake blood uses toxic compounds like antifreeze. Since you're likely to use your blood at parties or haunted houses, and such gatherings are often magnets for children (and children + antifreeze = bad). So, we'll start with the non-toxic variety of fake blood. It may not be the choice of indie horror film directors, but it'll get the job done for Halloween.
Here's the recipe:

• White corn syrup
• Red food colouring
• Water
• Blue or green food colouring
• Arrowroot powder or Corn Starch

Start with about 1 tablespoon of Arrowroot powder or Corn Starch in a large bowl. Either one of these will do, though Arrowroot powder is better for avoiding lumps. Now add about a cup of White Corn Syrup and mix it up with the powder. The results will be rather thick, so once you have it mixed, start thinning it down with water until you get something close to the consistency of blood -- about 1/4 to 1/2 cup of water should do the trick.
Now that you have a base, it's time to add the dye. Start with the red and add a few drops at a time, mixing thoroughly until you have a nice red color. But of course, real blood isn't bright red. That's where the blue and green dye comes in. Add a couple of drops of either colour until it looks more like actual blood.
Once it looks like blood, set your mixture aside and let it thicken a bit before applying it to your costume. If you're looking for something a bit more edible, add a few drops of peppermint extract. Mmmm -- minty blood!
CAUTION: This mixture will stain your clothes and might temporarily discolour your skin as well.

It won't leach lead into your skin or do anything else truly frightening, but you definitely don't want to let this fake blood near your mouth, eyes, nose or any other orifices.
Here's the recipe:

• Water-soluble hair gel
• Water-soluble personal lubricant
• Red food colouring or liquid dye
• Blue or green food colouring or liquid dye

Pour alcohol-free, water-soluble hair gel in a bowl. We're going to add some other liquids so you only need to use about three-quarters of what you want the total amount of blood to be. Now add some water-soluble personal lubricant (Astroglide works well here). You want the lubricant to thin the hair gel down so that it's just slightly thicker than water -- start with a small amount and add more if you need it.
Now it's time to colour the mixture. As with the non-toxic version, start with red dye and then add blue or green to shift the color to something more bloodlike. Chocolate syrup can also be used to create a bit more maroon color.
The advantage of this blood is that it's not sticky and, if you experiment a little bit, you'll find that flinging it around creates very realistic splatters.
But, as with the other variety, use caution since this mixture will stain just about everything it touches.

Recipe:
Mix 5ml of flower and 20ml syrup in mixing bowl
Add one cap of red food colouring
Dab (very small amount) of blue food coloring and mix in
Put in container for use on set

RUMOUR: add washing up liquid/powder makes the fake blood wash out of clothes (not tested, only use on old clothes first)
Try different colours by varying amount of blue food colouring
Thick blood by adding chocolate sauce
Thinner blood by adding water

Recipe:
Homemade Fake Blood

• 1 c. Karo Syrup
• 1 Tbsp Water
• 2 Tbsp Red Food Coloring
• 1 tsp Yellow Food Coloring

Mix together in a mixing bowl and you're done. Try adding blue or yellow for a different shade.

Recipe:
Chocolate Fake Blood

• 1/2 c. Warm Water
• 4 Tbsp Corn Syrup
• 1 Tbsp Powdered Cocoa
• 1 tsp Red Food Colouring

Blend the water and cocoa together and then add the rest of the ingredients. Let the concoction sit for awhile and skim the bubbles off of the top. Add a couple of drops of yellow food colouring if you're not satisfied.

Recipe:
Simple Fake Blood

• Clear Corn Syrup
• Red Food Colouring
• Milk - Optional

However much fake blood is how much corn syrup you'll need. Pour it into a bowl and mix in some red food colouring. Add some blue if you like. Adding a small amount of milk will make the blood appear darker and thicker.

Recipe:
Realistic Recipe

• 2/3 c. Corn Syrup
• 1/3 c. Warm Water
• 5 Tbsp Corn Starch
• 4 tsp red food colouring
• 1 Tbsp Powdered Cocoa
• 2 drops of green or yellow food colouring

Mix the corn starch with the water in a large mixing bowl. Stir in the corn syrup. Add the food colouring slowly, checking for colour.

Recipe:
Gravy Blood
This is fairly new and I haven't had chance to test it properly but its looks GREAT!

• Gravy Granules
• Red Food Colouring
• HOT Water

The directions are EASY, all you do is make the gravy up as you would normally but if you feel like it, you can make it a bit thicker, then add the red food colouring. It's up to you how much you add but too much will stain as it will not have been diluted enough.

Recipe:
Cheap 'N' Easy Blood
This is good for spidering:

• Plain Flour
• Water
• Red Food Colouring
• 1 tsp. of Coffee

Boil the water on the stove, then sieve in the flour, making sure you get ALL of the lumps out. The quantity of ingredients aren't important, it just depends on how much you want. Once you have the flour mixed nicely into the water it should look nice and thick. Next, add the red food coloring.
You will notice that it's a ghastly, bright red colour but don't worry this is why we add the coffee. It is important that when you add the coffee to make sure the mixture is hot, otherwise it wont dissolve, but up until adding the coffee can be done in a ordinary mixing jug or pan.