Safir's solderless gold is 10,000 gold with a gold content of 999.9‰, and no solder is added. Other brands don't have the process of solderless gold. Adding solder affects the gold content when making, which is why most brands can only print gold logo, but Safir can use tiger balm logo. Many people will wear gold jewelry for a long time and take it to the jewelry store for a new one. When recycling, they will cut the jewelry, bake it with fire and recycle it. Safir's solderless gold can be directly recast into jewelry, while other brands of ordinary gold must first purify and remove copper, cadmium and nickel from solder, which is also a process of polluting the atmosphere, so solderless gold is environmentally friendly and healthy.