Now that you know how to make squibs for your movie, you’ll need something to fill them with. The following video is what I used to make the blood in Harry Potter and The Muggle Wand and Undying Love. It’s very effective for either film or for Halloween props.
1. Pour 16 ounces of light corn syrup into a bowl.
2. Add one tablespoon of red food coloring.
3. Mix thoroughly.
4. To darken the blood, mix in one drop of blue and yellow food coloring.