Casting is one of the earliest known forms of metal working. In its most basic form, it involves heating metal until it is molten and then pouring it into a mold. As the metal cools it takes the shape of the mold. Early castings were crude in finish with a lot of surface anomalies that required a great deal of machine work to get the desired quality of surface texture. Modern casting techniques produce very fine tolerances and the casting requires little or no finishing work.
Have you ever wondered how fine custom jewelry was created? The process is really very simple. Most fine jewelry is created using a technique called the “lost wax” method. First a specific design has to be created. This usually requires a person who has a fair amount of ability to render a drawing which looks like the finished piece! Once the designer and client agree on the design, the next step is for the item to be carved using a special wax (there are different wax products depending on the object desired).
Efforts of such people must be all the more appreciated if we are to realize that not many countries can boast of such ancient civilizations. Therefore the preservation of this precious heritage is a matter of utmost importance and everyone should take pride in such a cultural history.
One of the most ancient methods is the Lost-wax or investment casting method. The Lost-wax method is known to date all the way back 4000 years ago. Although this method was used by every ancient culture that worked with bronze, and it was the Greek who perfected the technical proficiency of the Lost-microfusione acciaio inox method. The Lost-wax method is the method used by the Roman civilization to create bronze gods and leaders. The word Roma was derived from the Roman era and is used to describe how pieces of a bronze sculpture fits together.
Once the various pieces are completed they are carefully assembled to form the final wax model. Using the flame of a lamp the connecting points are heated do that they can be melted together. With the artist’s finger, the arm joint with smoothed to fit with the torso and the torso smoothed to fit with the base .Once completed the wax model are placed into water to ensure that they do not loose shape in the Indian sunny climate.
4) Molten gold is then poured into the mold as the entire mold is placed in a vacuum the vacuum action draws the gold down into every crevice of the mold forming a perfect copy of the original design.
As for the type of foam to use you are going to want to steer clear of anything that will give off toxic fumes when heated. Urethane foam is toxic. The popular foams to use are the polystyrene kind which is used to pack electronics and the polystyrene foam used for insulation. These foams can be found at many home improvement stores and even a few all purpose retail stores.
In the final step, the artist melts the silver and pours the liquid silver into the mold. Once solid, the mold is then broken open and the silver pendant is then removed once it is cool enough to be handled.