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In recent years, we have witnessed a growing concern of manufacturers and retailers regarding the quality of the jewelry products. Closer attention is being paid to such issues as general aesthetic appearance, surface finish, color consistency, strength and overall durability of jewelry. Responding to the increasing quality requirements, we have made an attempt to develop some specific methods for testing the finished jewelry products including various chains, bangle bracelets, castings and components..... (1998) Complete Story
Manufacturer spend much time and money diagnosing defects that are believed to originate in the casting process, but actually occur during waxing. Many companies run in circles, changing this gate/sprue, that metal, these temperatures, and screaming at suppliers to try to fix the 'mystery' problem. While these areas certainly can be the source of problems, many defects are misdiagnosed as casting defects, and thousands, perhaps millions, of dollars are wasted in search of non-existent flaws in the casting process.... (2003) Complete Story
Natural rubber or silicone rubber? In the world of lost wax casting, this question is hardly an academic one. The mold material chosen must be up to the task of turning a single original model into hundreds or even thousands of wax models for casting, and choosing the wrong material can lead to some serious hair-pulling in the casting department. There are actually three primary categories of rubber mold making materials.... (2003) Complete Story
There is always pressure to reduce the cost of manufactured items and carat gold jewellery is no exception to this situation. In fact, it is only relatively recently (1997) that the economic and currency turmoil in countries like South Korea, Thailand, Malaysia and Indonesia had such an impact on the local gold price that, at times, gold jewellery sales effectively ceased altogether. In Indonesia, for example, at a time when the dollar gold price was falling, the gold price in the local currency increased by 90%. What, then, are some of the ways in which gold jewellery costs can be reduced? One approach is the use of mass production techniques to lower the unit manufacturing cost of items. Such techniques include the well-established chain making, stamping and investment casting, the more recent electroforming and the very recent powder metallurgy processes. These techniques are continually developing as equipment manufacturers make more advances and market their products more widely..... (2002) Complete Story
The one tool that allows each of these jewelers to do their jobs better is a laser welder, a technological advancement that is becoming increasingly common in trade shops and manufacturing facilities. By using a sharply focused beam of light to produce very high heat in a small area, lasers are allowing jewelers to routinely accomplish tasks that would once have been either impossible or too time consuming to be worthwhile.... (2003) Complete Story
