ISO PDF Download

BS EN ISO 9202:2019 pdf free.Jewellery and precious metals -Fineness of precious metal alloys. 1 Scope This document specifies a range of fineness of precious metal alloys (excluding solders) recommended for use in the field of jewellery. NOTE， There is a possibility that national legal requirements for the designation, marking, and stamping of finished articles exist in the respective countries....

BS ISO 24018:2020 pdf free.Jewellery and precious metals -Specifications for 1 kilogram gold bar. Bars should have flat and smooth surfaces (a small shrinkage on the top surface is acceptable), and be free from cavities, holes, and significant layering. Edges shall not be sharp and pose a handling hazard. There is no specification for the internal quality, but the presence...