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| [1018] Colored Gold Alloys |
From ancient times, gold has been used mostly in decorative items, and the colour of gold plays an important role in this application field. Different methods have been developed to objectively characterize the colour. This paper describes the CIELAB system, which has gained acceptance as an effective way to assess colour. The different coloured gold alloys known today are also described, with emphasis on the relationship between their metallurgy and their colour.... (2012)
 Complete Story |
| Show me more articles from: [The World Gold Council]|[Cristian Cretu and Elma Van Der Lingen] |
| Releated Categories: [Metallurgy] |
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| [641] Colored Karat Golds for Investment Casting |
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 |
| Show me more articles from: [The World Gold Council]|[Damiano Zito] |
| Releated Categories: [Metallurgy] |
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| [1029] Hard 22 Carat Gold Alloy |
The jewellery market is looking for harder high-carat gold alloys that are more resistant to wear and scratching. Current research is addressing this need, and this paper discusses the development of a hard 22 carat gold alloy for jewellery applications.... (2012)
Complete Story |
| Show me more articles from: [The World Gold Council]|[Cristian Cretu, Elma Van Der Lingen and Lizelle Glaner Mintek] |
| Releated Categories: [Jewelry Mass Production]|[Metallurgy] |
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| [1024] Heavy Metal, Tips For Working With Testing Labs |
Before you submit any jewelry item to a lab to test for heavy metals, you´re going to need to do a little homework. Current state and federal laws regulating lead and cadmium levels in jewelry have mounted hurdles that jewelry makers must clear -- and some of those laws pertain to both adults´ and children´s products. It´s important to understand the regulations and your customers´ requirements. If you find that you do need to submit your products for testing, there are a few things you can do to ensure that the testing process goes as smoothly as possible. The more informed you are when entering into a relationship with a lab, the better you can expect your results to be. The following is a collection of general guidelines for jewelry makers to follow when working with a testing service.... (2012)
Complete Story |
| Show me more articles from: [AJM]|[Tina Wojtkielo] |
| Releated Categories: [Jewelry Mass Production]|[Metallurgy] |
| ISBN: B00006K39S |
| [266] Metals Under Fire - Enameling success depends on the metal underneath |
In this article, I will discuss the basics of metal preparation for the enameling process. Some experienced enamelists may disagree with part of this. But remember, these are general rules from a metallurgist's point of view, not an enamelist's. The article is not intended to outline or recommend any particular preparation or enameling technique, but rather explain why we do certain things to precious metals during the process of enameling..... (2003)
Complete Story |
| Show me more articles from: [AJM]|[Stewart Grice] |
| Releated Categories: [Enameling]|[Metallurgy] |
| ISBN: B00006K39S |
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