Can helium be filled into balloons and how can the floating time of balloons be prolonged?

Q:Can helium be filled into balloons and how can the floating time of balloons be prolonged?

A:First, helium gas other than hydrogen can be filled in, which can extend the floating time of the balloon. The correct operation is to squeeze a small amount of protective liquid into the balloon before filling it with helium gas and knead it evenly, which can seal the inflation port of the balloon skin. During this process, the floating time can be extended by 2 to 3 times. And after filling with helium, avoid direct sunlight or high-temperature environments to slow down the escape of helium.