Archivy značek: How do you test for 925 stříbrná kvalita? Design šperky

How do you test for 925 stříbrná kvalita? Design šperky

  There are two commonly used tests to determine the silver content in an alloy. X-ray testing is non-destructive but requires special, expensive equipment. Jewelry must be sent to a lab for x-ray testing. This test is fairly accurate on most silver items. Však, it can be fooled by layered metals and some types of […]