Black to clear thermochromic paint (Can be purchased from Paint with Pearl )
Transparent base for water-soluble inks (Can be purchased from eNasco )
A bowl and spoon for mixing the paint and base
A sheet of wax paper
Some sort of white fabric; tank tops work best
Step 1: Preparing Your Paint
Step 2: Mixing
Step 3: Designing Your Mask
Using your paint, spread the ink on the wax paper in any sort of Rorschach ink blot design. Make sure it's symmetrical and that you spread the paint on very thickly. You can make it as simple or as complicated as you'd like.
Step 4: Orienting Your Mask and Drying
Step 5: Your Mask Is Complete!
Because the paint is thermochromic, it will disappear when you exhale through it (or when it comes in contact with anything above 86 degrees Fahrenheit) and reappear slowly as you inhale, creating the illusion that it's moving.
You can cut and sew the mask to fit your head size and shape, or if you're fully dressing up as Rorschach, you can simply tie the mask tightly back and place the excess fabric under your hat.