Why does ice you buy from the store have holes in the middle? Also, why are they more clear than what a home icemaker produces?
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Hi production manager for an ice company here. The ice in question in created by tube ice makers, we use Vogt ice machines. The way they work is this. Think of a pipe of water, you cool the outside of the pipe and to get the ice to freeze without expanding and breaking the pipe you spin the water. To do that these pipes are vertical and a cap is put in the end with holes drilled off center. The water is under pressure and is forced threw the holes causing it to spin all the way down. So inside these machines there are many hundreds of these pipes and water is pumped to the top. Once the ice is thick enough the refrigeration system is essentially reversed and the ice slides out of the tube into a cutter. Everything is stainless or bronze or food grade plastics.
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