In order to pursue beauty, the frozen ice must be free of impurities and bubbles, so the ice making process is strict. In the choice of materials, pure water will be chosen. In order to ensure that there are no bubbles in the frozen ice, the water should be boiled first. The principle is that there is a lot of air in the water. After all, middle school physics tells us that air is soluble in water. Boiling water can solve this problem well.
So why is the ice in the shop outside transparent? Because they freeze at a very slow speed. So that the bubbles in the water have enough time to get out of the water. It's just like the ice valve under the eaves in the cold winter in the north, and the ice slowly formed is very transparent. How to make transparent ice cubes at home? There is a simple way! That is to boil the water, so that most of the bubbles in the water will run out. When it becomes warm water, put it in the refrigerator and freeze it, and you can get transparent ice cubes.
Then the water is cooled and poured into a large-capacity vessel instead of a special small ice cube. Because if you pour it into a small ice cube and the water freezes from the outside to the inside, then a lot of air will remain in the ice cube, and then many bubbles will form. No wonder the ice cubes frozen by yourself are ugly. If there are bubbles in the large ice, it will only exist in the middle part. Just cut it off after freezing.