Mix 60g of water with the 15g of cornstarch until the powder is dissolved.
Boil 60ml of water in a cooking pot.
Once the water is boiling, turn the stove heat from high to medium and slowly incorporate the water/cornstarch mixture into the boiling water.
Mix until the solution bubbles and remove from the heat. The consistency should we white and glue-like
Using a paintbrush, apply the stiffener to the fabric. Give it the shape you desire and let it dry! The corn starch stiffener becomes transparent and very sturdy. This can be used as glue as well! See variation in ingredients section above.