Last Updated: Jul 19, 2016 Views: 240
Thank you very much for your inquiry. Molds for pressing machines are generally made from cast iron. Many glass factories such as Blenko, Imperial and Fenton used cast iron molds. Here's a link that may be helpful to you.http://www.glassblower.info/glassblowing-molds/press-mold-glassblowing.html
If production is low a more inexpensive way of pressing the glass by hand would be to us a graphite mold such as this: http://www.craftster.org/Craft-Supplies/General-and-Miscellaneous-Crafting-Supplies/Mosaic-and-Glass-Crafts/Spiral-Flower-Graphite-Push-Mold/222403/
If you have any further questions feel free to contact me.
The Corning Museum of Glass is currently closed to the public effective March 16 through April 22, 2020, as a precautionary measure for public health and safety. As a result, resources available to answer your questions are extremely limited. During this closure, you may be interested in searching our Ask a Glass Question FAQs or reviewing our Research Guides on various topics. We also highly recommend checking out The Corning Museum of Glass on YouTube for hours of artist demonstrations, lectures, and special events. Thank you for your patience.