luminous yarn or fiber are a new functional and environmentally friendly material made of rare earth luminescent materials. As long as it absorbs all kinds of visible light for 10 minutes, it can store light energy in the fiber, continue to emit light for more than 10 hours in the dark state, and can be recycled indefinitely. When there is light, the luminous fiber shows various colors, such as red, yellow, green, blue, etc. When there is no light, the luminous fiber itself emits light of various colors, such as red light, yellow light, green light, blue light and so on....
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