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Lost Wax Technique- for Glass Casting


Casting Glass is not for the faint hearted, it is expensive to establish a glass casting studio and time consuming. If you can rely on a school to get you started or a mate with the right gear, do this first. When you think you have spent enough money, get ready to start buying more equipment and or glass.
It took me 3 years full time to become content with my skills base. I am now comfortable about casting glass with a predictable out come (fingers crossed). It does help if someone can teach you.
This is a basic run down on the procedures from start to finish there is approx. 25 separate steps in the process which does not include finishing.
- Design the work 1 - 200 plus hrs. depending of course how intricate or large.
- Mold any piece that may be reproduced in Silicone Rubber. This should be seen as insurance against damage or loss in firing.
- Cast or build the work in Wax, and finish for investment and firing.
- Design wax Sprues and Gates for getting the glass into the mold and venting the air out. Best to design your air vents in the upside down position so that you can visualise how any air may become trapped.
- Make molding box to invest the work in plaster allow at least 30 mm or 1" around the sides for molding strength, also determined by the amount of glass to be cast. I use a thin gauge galvanised steel as its generally easy to conform to the desired size. I seal the bottom (perspex) to the tin with wax applying the wax (or welding) with a soldering iron.


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