why are the helium-filled balloons at the grocery store almost always silver colored?

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2007-04-17 11:25:11 · 4 answers · asked by lar5936 1 in Science & Mathematics ➔ Chemistry

Because they use mylar to make them.

2007-04-17 11:28:10 · answer #1 · answered by pepper 7 · 0⤊ 0⤋

The silver stuff is mylar. Mylar holds helium for a lot longer than rubber (balloons).

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2007-04-17 18:28:40 · answer #2 · answered by tlbs101 7 · 0⤊ 0⤋

Because they are made of a polyester film called mylar which is silver

2007-04-17 18:29:00 · answer #3 · answered by Anonymous · 0⤊ 0⤋

that kind holds the helium better. they stay afloat longer. the rubber ones fall w/in a day.

2007-04-17 18:28:39 · answer #4 · answered by agkwatson@sbcglobal.net 3 · 0⤊ 0⤋