This egg-like object is a urethane foam formed of two liquids that produce a chemical reaction when mixed together, forming carbon dioxide-filled bubbles that cause it expand to many times its original volume. Because of the relatively low-tech processes needed to cast this material and its fidelity to its mould, it is very useful for tinkering and making prototypes and props.
This polymer also forms a skin on its outer surface when it cures, which means the cast object can be painted to look like an egg or a concrete block whilst still retaining the flexibility and ‘squidginess’ of a foam. The material also has a short-term ‘memory’ and retains the shape of your fingers for a few seconds after you’ve squeezed it.
Sample ID: 53
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