The consistency of the woolite is excellent, but you can add cornstarch if you want it to set up a little thicker. Add a pinch of salt to each beaker to make a saturated solution. Keep these chemicals away from eyes and mouth. Fluids are clear till mixed with each other. Coat the area to be cut with one fluid and coat the simulated edged weapon in the other fluid.
Chemicals turn blood red on contact.
This is a mix we have found is easy and cheap to make, and works rather well. We find it particularly useful for bloodbags. A spatula, spoon or paint brush. A squirt of washing up liquid. The base is Golden Syrup, use the cheap own brand stuff.