Glass Slumping Mold Mix
by Keith Lemons
(Dryden Michigan)
I want to make a glass slumping mold. Could you please recommend a mold mix for me to purchase. Or if I should mix my own what materials do I use and of what proportion. Should I drill small holes in the cavity to let the air escape as the glass slumps? If I let it dry for a couple weeks would the mold be ok to use without a firing to dry? I ask this because I dont have my own kiln yet and will be charged per firing.
Thank you so much for your help.
Hi Keith, thanks for your interesting question. I always mix my own - that way I can make it a bit runnier if I have some very delicate marks to pick up. You can find the recipe - and other tips - here on my Glass Mold Making Instructions page.
Small drilled holes are a good idea to prevent the glass misshaping or bubbling in the firing. Drill them at the lowest point of any 'dips' in your slumping mould. I use an old-fashioned hand drill, as molds can be a bit delicate - but you might be handier with an electric drill than me!
Yes, two weeks should be fine for letting the slumping mold dry out and preventing an additional firing.
Hope your glass slumps to perfection!
To find out more about how to make stained glass, click here and return to the Everything Stained Glass home page.
