Sterling silver contains 92.5 parts silver and 7.5 parts ……what?
Sterling silver such as wheel polishing, which are typically performed by professional jewelers or silver repair companies, are reserved for extreme tarnish or corrosion. Sterling silver Sterling silver is an alloy of silver containing 92.5% by weight of silver and 7.5% by weight of other metals, usually copper. The sterling silver standard has a minimum millesimal fineness of 925. "Fine silver", for example 99.9% pure silver, is relatively soft, so silver is usually alloyed with copper to increase its hardness and strength. Sterling silver is prone to tarnishing, and elements other than copper can be used in alloys to reduce tarnishing, as
Sterling silver at room temperature, and thus is called “cold-working”. The repeated strikes of the hammer work hardened (sterling) silver, causing it to become brittle and difficult to manipulate. To combat work-hardening, silversmiths would anneal their pieces—heat it to a dull red and then quench it in water—to relieve the stresses in the material and return it to a more ductile state. Hammering required more time than all other silver manufacturing processes, and therefore accounted for the majority of labor costs. Silversmiths would then seam parts together to create incredibly complex and artistic items, sealing the gaps with a solder of 80