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This product is used for avoiding the silver in the electroplating finished and the sulfurs in the air come into being a chemical reaction, resulting products discolored. So when the product is finished, it should be packed as soon as possible with sulfur-free paper, wearing sulfur-free glove to touch the product, and can not touch the electroplating surface either. Technical Parameters 1, Specification：17 g/m2, 25 g/m2, 31 g/m2, 40g/m2, 45g/m2 2, Sulfur dioxide≤50ppm 3, Sticky tape test：No hair falling phenomenon. Storage Condition and Duration Be stored in dry and clean storeroom with 18℃～25℃, away from fire source、water source, and prevent direct sunshine. Seal packaging, durability for one year. Payment: T/T or L/C 
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Contact Info:
Suzhou Yingrui Electronics Co.,Ltd.
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sulfur-free paper