Bring water to a boil in a large pot. I used a turkey fryer. Worked perfectly.
While water is coming to a boil, add water to cornstarch just enough to cover the top.
Mix until all combined. It should look like thick cream.
Once water boils, turn off and add the cornstarch. Stir until combined.
You can now add the fabric and let it sit about 2 hours in the liquid cornstarch.
Hang fabric to dry (before you cut it).