Sulfur-free paper
Mainly used for silver-plated packaging, such as circuit boards, LEDs, photovoltaic cells, hardware terminals, food protection products, glass packaging, hardware packaging, stainless steel plate partitions, food packaging, etc.
Description
Sulfur-free paper is a special backing paper used by circuit board manufacturers for the PCB silver conversion process to avoid chemical reactions between silver and sulfur in the air. Its function is to chemically deposit silver to prevent silver from interacting with the air.
The sulfur reacts chemically, causing yellowing. It does not contain sulfur, which can avoid the disadvantages caused by the reaction between sulfur and silver.