A selection of craft information for artisans of the HFS.


    Lost Wax method of metal casting

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    Dame Katrin Karlsdottir

    Posts : 28
    Join date : 2011-06-02
    Age : 50

    Lost Wax method of metal casting

    Post  Dame Katrin Karlsdottir on Thu Jun 02, 2011 6:50 pm

    Lost Wax Method

    Lost wax method or
    casting is an ancient process dating back thousands of years to ancient Egypt,
    Greece and Rome. It is still the best method for capturing exquisite detail in
    metal objects, which could not otherwise be produced given the complexity of
    their design. This process allows anything modeled in wax to be recreated fully
    and faithfully into various metals. The lost wax method is still employed today
    in the areas of sculpture, fine jewelry, restorative work in dentistry and in
    the industrial setting. It is a demanding and expensive process, but rewards
    the artisan with an object of great detail and individuality.



    • The critical first step is to create a wax (although
      clay and other materials can be used) original model of the sculpture.
      Care must be taken to capture the smallest of detail; all details and
      features the artist desires in the finished piece must appear in the wax
      model.

    • The wax model is then encased in liquid rubber which,
      once set, is carefully cut away to provide a “negative.”

    • Molten wax is injected into this cavity, which is
      allowed to cool. It is next removed from the rubber mold in the form of
      the original. After careful inspection, the new wax model is covered with
      plaster of Paris and fired.

    • The heat melts the wax, which trickles out through a
      tiny opening and is thus “lost.” All that remains in the plaster is a
      perfect hollow in which every surface detail of the wax model is captured.
      Molten silver is then poured into the plaster mold.

    • Once the silver has sufficiently cooled, the plaster
      mold is broken apart, revealing the silver casting. The casting is then
      cleaned and checked to ensure that every detail of the original has been
      faithfully reproduced in silver.

    • Finally, the piece is hallmarked and polished.

      Current date/time is Mon Oct 15, 2018 10:11 am