Last winter I had a whim and a handful of cheap balloons, so I made a set of colorful ice balls. This post does show how to make them, and what mistakes I’d made. But unlike other posts you’ll find on making ice balls, I show the odd thing that happens as they age. So read to the bottom.
First, wear gloves if you don’t want colorful hands for a week or so.
Then make sure that you have a place to put them to freeze. I chose to do them naturally outdoors, and will explain what I did wrong there below.
So, take a balloon and put a few drops of food coloring in it. Then fill it with water, somehow. Caution, if the balloon pops, you may get sprayed with permanent dye. Wear an apron, or clothes that you don’t care about.
Gently place the jiggly ball of dye in a cold place. Below 25ºF is best. If you use a freezer, put them in a bowl or something that will catch the liquid if the balloon fails. I put them on a stoop in the snow. Unfortunately, the warm balls melted the snow and they rested on the warmer concrete. So they froze unevenly, and I tried to move some of them too soon. Next time, I will place them on a chair or bench or anything allowing an air gap between their resting surface and the ground.
But most were solid enough for me to pop and remove the balloons. The blue one up close ruptured and leaked, but the other blue one bounced to the bottom of the stairs without losing its cool.
But I did get a nice set of balls to stack as a decorative accent. They got snowed in, and the snow faded and stuck to them over the course of a few weeks.
But note this weird thing! When the temperature got up close to freezing and then cooled at night for a few days, the dye settled within the solid ice!You can see the distilled, purer water ice at the top, and the more concentrated color collecting lower down.
So The Object at Hand today is either the literal ice balls, or the lesson in physics showing how simple natural processes can cause dye to un-mix from frozen water; an apparent reversal of entropy.
This process is similar to Zone Melting, by which silicon is ulta-purified to make semiconducting wafers to make the chips that make it possible for you to read this.