Lead-free solder is a type of solder used in electronics that does not contain lead, a toxic metal. It is primarily made from a combination of metals such as tin, silver, and copper. Lead-free solder is designed to provide a safer alternative for both manufacturers and consumers, reducing health risks associated with lead exposure. The use of lead-free solder became more common after regulations like the RoHS (Restriction of Hazardous Substances) directive were introduced in the European Union. These regulations aim to limit hazardous materials in electrical and electronic equipment, promoting environmentally friendly practices in the industry.