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

Q:Can latex balloons be filled with helium and how can the floating time of the 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 and knead it evenly before filling with helium gas, 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.