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Sulfur-free paper
Sulfur-free paper is a special padding paper used in PCB silvering process in circuit board manufacturers to avoid the chemical reaction between silver and sulfur in the air. Its function is to avoid the chemical reaction between silver in electroplating products and sulfur in the air, so that the products turn yellow, resulting in adverse reactions. When the product is finished, use sulfur-free paper to package the product as soon as possible, and wear sulfur-free gloves when touching the product, and do not touch the electroplated surface.