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The manufacture of jewellery is an important activity in Valencian industry. The aim of the precious metals analysis and assay laboratory is the control of quality in the production of jewellery by analyzing the standard of the products that arrive for testing.

The laboratory has been accredited by ENAC since 1992 for the analysis and assay of objects made from precious metals (gold, silver, platinum) and is the laboratory authorized by the Autonomous Community of Valencia for performing this activity.

Analysis of Standards

Verification that the precious metal content in the product is not below established standards. These test standards take effect from 31st December 1996:

GOLD 999 916 750 585 375
SILVER 999 925 800    
PLATINUM 999 950 900 850  

GOLD Cup assays, in agreement with ISO-11426 (EN-31-426 equivalent)
SILVER Potentiometric Valuation, in agreement with ISO-11427 (EN-31427 equivalent)
PLATINUM Atomic absorption spectrometry, following internal procedure (PE-MP07)

Assay with Hallmark

Application of hallmark with official punch as proof and control of the authenticity of the analyzed products, in compliance with the legal standard 17/1985 of July 1 pertaining to objects manufactured with precious metals and laid out in the Royal Decree, 197/1988 February 22, which approves the legislation of said legal standard.

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