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EU +353 1 522 2688

UK +44 29 20 64 76 56

Tarn-Pure has established supply chains for sourcing silver and copper


We only supply 99.99% pure silver (“Four Nines Silver”)

Typical forms include:

Fine Silver Grain

Cylindrical Rod





10ppm colloidal suspension electrolysed in 18.2MOhm deionised water (1l containers - 1000l IBCs)

Manufactured electrodes

We purchase our silver from, one of the world’s largest and most respected suppliers of precious metals.

Metalor and Tarn-Pure both have ISO9001 accreditation and we offer full traceability of material back to the mine from which the ore was originally extracted. Every supply is accompanied by a certificate of conformance and a certificate of chemical analysis to ensure that our customers may rely on the quality of the metal purchased.

Our customers are also supported by Metalor’s technical professionals across Europe. They will provide input to help our customers formulate silver forms to optimise manufacturing processes and can supply from sites based in France, Germany, Spain, Sweden, Switzerland and the UK. All deliveries effected by Metalor are supplied through Fedex fully insured secure courier services.



Copper is a commodity material. It is a fraction of the price of silver and, to remove production cost, it is not industry practice to provide chemical analysis or mill certificates for copper held by stockholders. Instead, ECHA has agreed that the reference specification for copper to be used in biocidal products will be grade CW004a, 99.90% pure copper.

This grade of copper is characterised as “High Conductivity Oxygen Free” copper which is ideal for use as an anode. It has been selected as many deployments of copper as a biocide require electrolysis to release Cu⁺⁺ ions to attack harmful gram negative pathogens.

While CW004a is the official “reference specification” any supply of higher grade copper, such as CW007a or CW009a is permissible, although more expensive.

Tarn-Pure will supply copper typically as:




Manufactured Electrodes


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