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Foil balloons will stay inflated with helium between 6-8 hours and 8-10 hours with air. Tie a curling ribbon below the valve of the foil balloon, rather than above, to prevent air or helium leakage. Confetti balloons will typically stay inflated between 10-12 hours with air or 8-10 hours with helium. Pump 10% of air, then 90% of helium to keep confetti scattered and help extend floating time. Conduct static electricity by rubbing a soft cloth against balloon so they confetti clings to the balloon walls. Generally, 12-inch latex balloons filled with helium will float between 6-10 hours. Balloons filled with air will stay inflated between 8-10 hours outdoors and 12-20 hours indoors. For outdoor displays, under-inflate the balloon by first over-inflating the balloons then releasing gas so the balloon can easily expand later to the weather. Helium is sensitive to temperature; cold weather will shrink balloons, while heat will pop your balloons. In preparation for a party, test only one latex balloon the day before to monitor heat, humidity, or rain in your environment.