There are two common tests to determine the silver content in an alloy. X- ray testing is non-destructive but requires expensive equipment. Τα κοσμήματα πρέπει να αποστέλλονται σε εργαστήριο για ακτινογραφία. This test is relatively accurate on most silver items. The machine can be fooled by layered metals and some types of plating, […]
