Larry
11-11-2005, 11:15 AM
How do they make gold green?
Is it all yellow?
Lar
Bearman
11-11-2005, 12:46 PM
My sources tell me that gold is mixed with silver to give it the green color.
I always thought it was mixed with Kryptonite.
Gregory Diamond
11-12-2005, 09:06 AM
How do they make it white?
Bearman
11-12-2005, 10:14 AM
Infomation from the World Gold Council article I found on the net. I quote:
"Making gold white is similar to mixing colours in paints. Adding a red metal (copper) will tend to make gold red and adding a white metal tends to make gold paler and eventually white. Thus, all other alloying metals to gold, apart from copper, will tend to whiten the colour and so it is possible to make carat golds that are a reasonable white colour.
Whilst additions of any white metal to gold will tend to bleach it's colour, in practice, nickel and palladium (and platinum) are strong 'bleachers ' of gold, silver and zinc are moderate bleachers and all others are moderate to weak in effect.
This has given rise, historically, to 2 basic classes of white golds - the Nickel whites and the Palladium whites. The nickel-whites tend to have a colder white colour, whereas the palladium whites have a warmer colour. Good nickel whites tend to be hard and difficult to process. Good palladium whites tend to be soft, easy to process (but lost wax casting is more difficult) but are much more expensive, because of the price of palladium. Consequently, many commercial white alloys are thrifted in nickel or palladium and contain some copper; hence, colour is compromised. At the 8-10 carat (33.3 - 41.6% gold) level, gold-silver alloys are quite white, ductile although soft and are used for jewellery purposes."