Any time I’ve ever made ice at home the ice cubes are opaque – this is the case in different houses. But ice I get in restaurants, cafes and bars the cubes are always clear.
Anyone know the reason?
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Home-made ice freezes from the outside in. There’s dissolved air in the water but it can’t escape once there’s a clear layer of ice all around, so you get a cloud of air bubbles forced out of solution in the middle of the cubes. What you can do instead is fill an insulated container with water and put it in the freezer with the top open. Then it will freeze from the top down giving a thick clear slab of ice at the top. Pull this layer out before the water freezes all the way to the bottom and you get clear ice.
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