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It took about two months of experimentation to get the formulas for Platinum Sterling Silver just right - Robinson created alloys containing 5 percent, 3.5 percent, and 1 percent platinum. But he's the first to admit that combining silver and platinum isn't a novel concept..... (2004) Complete Story
In the jewelry industry, it's rare to have an alloy without drawbacks, particularly when the alloy is not yellow. When designing alloys, there are a number of hurdles to jump. First, color is absolutely critical. Unfortunately, we alloy designers have a relatively limited palette to work with. Gold and copper are the only two metals that are truly "colored;" all others are varying shades of gray. So when we design a white alloy, we don’t make it "whiter," we make it "less yellow." .... (2003) Complete Story
In practice an experienced eye will usually be able to determine by color and luster whether a piece is made of silver, a base white metal such as nickel silver, or a precious white alloy such as white gold or platinum. If this can be determined by eye, it's usual to proceed directly to the qualitative test.... (2001) Complete Story
In many countries, regulations govern the caratage of gold solders used to make jewellery and, with few exceptions, gold solder alloys should be of the same caratage as the jewellery. One problem with the production of solders is to ensure a good colour match with the jewellery being assembled.... (2003) Complete Story
In modern melting and casting technology, the need for products able to front competition in the field of quality and price encourages the development of new alloys that can guarantee better performance. Most significant innovations have taken place in alloys for investment casting, to improve the quality of castings. Additions of many elements to gold alloys have been experimented, but only a few of them appear to be sufficiently effective and easy to use. In this paper, we describe work carried out to examine technical and practical performances of some yellow 18 carat gold with additions aiming chiefly at improving alloy castability. Alloys of different composition have been tested and the effects of the different alloying additions have been compared, in order to find the addition elements that show better performance and able to give a true improvement of the quality level of the castings.... (2001) Complete Story
