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SolderingSoldering is a very important process in jewellery manufacture for joining various component parts into the finished piece. It involves heating the pieces to be joined and applying the solder alloy, which melts and runs along the joint gap. Heating is typically by gas torch although oil lamps and blowpipes are still to be found in workshops. For mass production, soldering can be done in a belt furnace.
Whilst soldering remains the dominant technique, increasing use of laser welding is an alternative approach especially in chain manufacture and for repair work, where heating by the soldering torch may damage gem stones. For most jewellery, solders should be of the same caratage as the jewellery, although there are some exceptions allowed by law in some countries. Many solders have traditionally contained cadmium but this is increasingly beinig banned under national legislation because of health and safety problems associated with cadmium fume. Alternative cadmium-free solders in the full range of caratages are available. See Carat Gold Solders. |
![]() The blog that crosses the boundaries between research and the industrial application of gold technology ACS Fall meeting25 Aug, 2010 Inbetween meetings yesterday I managed to attend a few lectures here in (an extremely rainy!) Boston. Vince Rotello of UMass and Richard Lambert of Cambridge delivered the 2010 Langmuir lectures, both of which were excellent. Other interesting talks included Jin Zhang of UC Santa Cruz discussing his group’s work in the field of solar cell [...] |