Answered By: Ken Burns Last Updated: Nov 18, 2016 Views: 94
Take a look at the information for pate de verre. The technique generally starts with a wax model that is coated with plaster to make a mold. The mold is filled with "frit" - powdered glass or tiny chunks of glass - that may be painted on the surface of the mold to make a delicate vase. Or, the frit may fill the mold to make a solid piece of glass. Either way, the mold is placed in the kiln to fire.
Some artists use larger chunks of glass to cast their glass in a mold (Libensky, for example). Henry Halem's book gives a description of their kiln process. [Halem, Henry. Glass Notes: A Reference for the Glass Artist...3rd ed. Kent, OH: Franklin Mills Press, 1996. "Libensky/Brychtova Casting Methods," pp. 29-41 (including how to make a wax positive); "Libensky Annealing and Cooling Method," pp. 22-23. The book includes other chapters that are relevant to kiln casting.
The Warm Glass website gives a better description of the technique:
Lost wax casting: http://www.warmglass.com/lost_wax_casting.htm
Kiln casting: http://www.warmglass.com/kiln_casting.htm
Creating the wax model: http://www.warmglass.com/model_creation.htm#material
Pate de verre: http://www.warmglass.com/pate_de_verre.htm
General information: http://www.warmglass.com/basic.htm
There is also a "tips" section of the website that has a section on lost wax casting: http://www.warmtips.com/20060225.htm
You may wish to take a look at the "warm glass forum" or bulletin board to see whether there are questions and answers that are relevant to your research.
It is important to look at some books for more in-depth information. For example, Philippa Beveridge's book, Warm Glass: A Complete Guide to Kiln-Forming Techniques - Fusing, Slumping, Casting (published by Lark Books) has step-by-step instructions for kiln casting and pate de verre, pp. 102-119; project, pp. 142-149. The book describes using a clay mold instead of wax, pp. 72-77.
Lucartha Kohler creates large kiln-cast sculptures. She describes her process in her book - Glass: An Artist's Medium.
This is just a start - attached is a casting bibliography to help you find additional resources.