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This paper is amazing: roll up is the flashlight, Still very cheap

A paper roll up is the flashlight, which is the Japanese designer nendo brought the latest ideas. nendo YUPO synthetic paper on both sides are printed on the circuit, and sticky 7 LED lights, 2 button batteries. As long as the paper rolled up, you can form a loop, a flashlight was born. The most noteworthy is that, because the paper itself has a certain resistance, the paper roll the more tight, the smaller the distance between the circuit, the smaller the resistance, LED lights on the brighter.
This paper surface is smooth, wearable, but also have a certain degree of water resistance, very suitable for industrial life.