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Umbrella is the requisite in rainy or sunny day. Weather changes particularly fast in summer, and sun shine and raining appear alternately.When it rains, we use opaque umbrella can not see the front side, it will cause potentially dangerous,such as bump
into some objects.However, using transparent umbrella in sunny days, can not prevent the sunlight. To solve this problem we design a special umbrella that can change status in different whether.The main material using in this umbrella is ink with its characteristics. It can be turned into transparent by meeting water in raining days, and change to opaque in sunny days when it dries.