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People take umbrellas no matter sunny or rainy days and used to hold it in front of faces to protect them from sunshine or heavy rain. However, for not seeing the front scene, this action may cause the following dangers: Car accidents or Crashing with pedestrians.
Therefore, with the membrane used in the eyeglasses to adjust the color of glasses, “Trans-color umbrella” may use this material to adjust the color of the surface. When raining, the surface becomes transparent; when clearing up, the surface becomes black. Therefore, even if people hold umbrellas in front their face, they can still see clearly and walk safely.