29. Legor's White Gold
Thursday, 28 Jan 2016
The information here "22. White Gold Dramas" is out of date.

Ever since we discovered a white-gold alloy from Legor (a well-known Italian company) that is relatively soft we have been accepting order for any kind of white-gold rings.

Legor has a bewildering array of master alloys for the creation of 10, 14 and 18K pink, white and yellow gold with many different characteristics.

One of them, NPF301 uses silver as the whitening agent, and since silver is a soft metal the resultant, white gold is much softer than the more commonly used alloys that use nickel as the whitening agent.

This was good news for me, since the white gold created by NPF301 is soft enough that I can work with it without trouble, meaning that white-gold rings are now back on the menu.

BUT, NPF301 white gold isn't really white.

For a start I don't rhodium-plate my white gold (which is the standard practice in the industry). For more information on this, see the Blog entry entitled "19. White Gold : No Rhodium-Plate".

Also, nickel is a better whitening agent than silver.

In addition, for some scientific reason, a mixture of gold and silver looks somewhat greenish and this is in fact how so-called green gold is created.

For technical reasons, NPF301 is only avaiable in 10 or 14K, not 18K.

The 10K alloy contains 10 parts in 24 of gold and somewhat less than 14 parts of silver, while the 14K alloy contains 14 parts of gold and somewhat less than 10 parts of silver.

Because of these proportions, obviously the 14K is less 'white' that the 10K, but significantly different in colour to normal 14K yellow.