Sometimes we like to pretend people on stage are bleeding. Here's a few ideas to get your creativity flowing.
The biggest advice I can offer for stage blood: START NOW. No, really. There's a lot to consider. How much, what type, what costumes/scenic elements/props are involved, what sort of delivery system will be used, how will the actors react to exposure, what the blood will look like under the lights, etc. Don't wait until tech weekend.
For a small amount that doesn't need to be live (like a cut finger in
The Clean House) I use a thick application of nail polish on a white rag.
My first experiences with stage blood/makeup came when I assisted with drunk driving reenactments. Those actors were asked to wear old clothes, took their positions in the mangled cars (prosthetic wounds in place), and were promptly drenched in 5 gallons worth of corn syrup and food coloring. Yes, really.
But that's a one-time performance. When you need costumes to be pristine for the next performance, you want a washable recipe.
If you have a healthy budget,
Reel Blood is a fantastic option. But it's pricey.
While working on
In The Blood I used ERA detergent and
Wilton Icing Coloring. (ERA is a bit more difficult to find, but far less abrasive than Tide. The actors will be grateful!) The sample batch was tested on the fabric and washed out well. (I worked on a production of
Sweeney Todd that used grapefruit dish soap for the base.
Creme de Coco used chocolate syrup. Whatever you choose coordinate with costumes and lights.)
We went through half a dozen delivery methods for the blood packs on that show. My favorite (though not used) was filling small zip-lock bags, chilling the mix, then using a Seal-A-Meal to create a clean seam. The packs broke under hand pressure but not in the actor's pockets prior.
No one gave a second glance to my project in the freezer.
In summary, time and communication are the essentials of this project. Have fun!