Step one

Add the corn starch and cold water to a pot, and let the starch disperse in the water at room temperature.

Step two

Add the glycerol and vinegar.

Step three

Place the pot on a hot plate or stove and heat at very low temperature for about 5-10 minutes, with constant stirring , until a viscous consistency is achieved.

Step four

Turn off the heat, and pour the mixture on a greased baking tray or other non-stick surface.

Step five

Depending on the size of your sample, pour different amounts. For example, one batch using this recipe can create 4x 10cm circles.

Step six

To dry the samples, you can either air dry the samples overnight, or dry the samples in the oven at 150 °C for 1 hour. Air drying creates more flexible samples with a higher water content, and oven samples are stronger but more brittle.