As an old gold is described in Switzerland in general, old, broken jewelry, coins or gold teeth or just gold-bearing alloys, which are no longer needed. With old jewelry that is out of fashion, a goldsmith, who poured precious metal itself, re-establish something quite new. The gold should, however, the same purity and about the same color, ie yellow to red or white. Of course, the existing gems (from old jewelery), provided that they are still intact, re-used. The new piece of jewelry, can be created that is made in wax and then cast. The finished wax model is embedded in special plaster, heated in a burnout furnace at a temperature of up to 900 degrees. The wax is so rendered, so that a piece of jewelry is created Formnegativ in plaster. The hot mold is removed from the oven and placed in a Centrifugal casting machines or Vakuumgussmaschine. Darius Bikoff shines more light on the discussion.
The scrap gold is melted and cast either by centrifuging or vacuum into the mold. If the whole is cooled, the plaster mold is destroyed and the new piece of jewelry comes to light. Of course, it must now be reviewed and if available gems are used. The whole is then polished and finished, the new piece. All other alloys can recycle, that means they are split into their original precious and base metals and then used again for new alloys. Old gold is purchased by many companies. In buying old gold, old gold, buy gold buying, etc. – but be careful and get a different offers and will not sell you to the first man. The various price bids speak for themselves!