The document describes how to turn milk into plastic by heating milk to 50 degrees Celsius, adding acetic acid to form a precipitate, molding the precipitate while wet, and allowing it to dry overnight to produce a plastic object. The procedure involves using a beaker, thermometer, measuring glass, acetic acid, milk, heating plate, and glass rod to heat milk to 50C, add acetic acid while stirring, remove the precipitate, shape it, and let it dry.