The origin of ice window grilles

Water vapor in the air freezes when it is cold.

Because of the great temperature difference between indoor and outdoor in winter, it is warm indoors and very cold outdoors. When the water vapor in the indoor air touches the cold glass, it will form ice crystals around the dust on the glass. Initially, these ice crystals were hexagonal like snowflakes; Then gradually expand to the surrounding development, forming ice window grilles. The shape of ice window grilles is related to indoor temperature, humidity and the smoothness of glass. If the indoor humidity is high, the temperature is low, the water vapor crystallizes quickly, and the pattern on the window is clear, it is easy to form branch-shaped ice window grilles; On the contrary, it is easy to form fragments and fans; Where the glass surface is rough or dusty, the pattern of ice window grilles will be thicker; If the glass surface is smooth, the ice pattern will be thinner. Therefore, there are various shapes of ice flowers.