Frequently Asked Questions About Arctic FoxTM Anti Tarnish Silver

Q: Are Arctic Fox™ anti-tarnish silver products already existing products rebranded for the Canadian market?

A: No. Arctic Fox™ anti-tarnish silver products have been developed by Umicore. They are available in Canada and the US.

Q: Do Arctic Fox™ anti-tarnish silver products has differences compared to sterling silver that have to be accommodated by the user?

A: The differences between Arctic Fox™ anti-tarnish silver products and sterling silver are shown on the technical data sheet. Casting parameters will need to be altered to accommodate the different melting range and density.

Q: Do we need to keep Arctic Fox™ anti-tarnish silver scrap separate when sending scrap in for refining?

A: No, this is not necessary.

Q: Other types of anti-tarnish silver may be brittle when hot. Is this also the case for Arctic Fox™ anti-tarnish silver products?

A: This behaviour has not been observed so far with Arctic Fox™ anti-tarnish silver products.

Q: Are Arctic Fox™ anti-tarnish silver products workable by cold-forming, rolling etc. and does it work harden during these processes?

A: Arctic Fox™ anti-tarnish silver products work hardens somewhat faster than sterling silver. Trials have shown that around 60% of reduction in area can be applied between annealing runs.

Q: Can Arctic Fox™ anti-tarnish silver products be annealed if work hardening occurs?

A: Yes and the annealing must be done under a reducing atmosphere.

Q: What precautions should be taken during annealing or in quenching after annealing?

A: The piece must be protected from oxidizing when heated for annealing and if air cooled. The Arctic Fox™ anti-tarnish silver alloy properties are not significantly different if an item is water quenched versus air cooled as long as the item is protected from oxidizing. Annealing should be done at lower temperatures than used for standard sterling silver.

Q: Do Arctic Fox™ anti-tarnish silver products transmit heat well?

A: Arctic Fox™ anti-tarnish silver products are less heat conductive than standard sterling silver but will heat up faster than karat gold alloys.

Q: Is it necessary to use specific solders for Arctic Fox™ anti-tarnish silver products?

A: The melting range of the components in the item will indicate if one or more of the easy, medium or hard silver solder alloys should be used. Any one of Umicore’s easy, medium or hard silver solders can be used to solder the fabricated Arctic Fox™ anti-tarnish silver products. The best colour match is with the I03H solder which has a flow temperature that is approximately 40°C below the solidus of the Arctic Fox™ anti-tarnish silver alloy.

Q: Do the Arctic Fox™ anti-tarnish silver products behave similarly to sterling silver during filing, sanding etc?

A: Yes.

Q: Can the surface of Arctic Fox™ anti-tarnish silver products be brought to a high polish?

A: Yes.

Q: Are Arctic Fox™ anti-tarnish silver products susceptible to formation of ‘fire scale’ (copper oxides) during hot work?

A: It is not as likely to see ‘fire scale’ on Arctic Fox™ anti-tarnish silver products as on sterling silver.

Q: Can Arctic Fox™ anti-tarnish silver casting grain be used for making fabricated products?

A: Casting grain contains minor elements that we do not recommend to be present in alloys that are rolled or drawn. Mixing and reusing scraps is not recommended.