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The goods has different two sides, one is black and the other is white. In summer and Autumn, the white side facing reflects the light, and black inside prevents light through.It works for reducing the temperature in shed. In Winter, using black outside can absorb light and makes frost evaporate.And white inward can prevent the infrared reflecting to shed outside, which keep warm. PE/PP material black and white energy-saving film, fully mastered the Three - layer co - extrusion technology, has reasonable control of anti-fog.,so that anti-droplet function effectively extended. Protect plants from the damage of pests, which increase the farm chemicals damage. Provide a suitable environment for plants.