Directional freezing
Directional freezing freezes from only one direction. Directional freezing can freeze water, from only one direction or side of a container, into clear ice.
Directional freezing freezes from only one direction. Directional freezing can freeze water, from only one direction or side of a container, into clear ice.
Directional freezing freezes from only one direction. Directional freezing can freeze water, from only one direction or side of a container, into clear ice.
Source: Wikipedia "Directional freezing" · CC BY-SA 4.0
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