Making thermoplastic starch Directions: 1. Add 15 grams (1.5 tbsp.) starch to beaker 2. Add 100 mL water to beaker 3. Add 10 mL glycerin to beaker 4. Put beaker on hot plate and heat to medium-hot temperatures (~100 degrees Celsius) 5. Stir until solution becomes thick and transparent 6. Pour solution onto aluminum foil or onto a metal pan 7.