How to Make a Glass Mold From Clay
Glass molds are used to slump plain window glass or stained glass into a mold to give it a shape such as a plate or bowl. If you are getting interested in creating some glass pieces but you don't want to spend a lot of money, try a real cheap and easy way to make a clay glass mold. The first step is to head down to a well-stocked ceramic green ware shop.
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Things You'll Need
- Slip cast ceramic form
- 1/4-inch drill bit
- Electric drill
- Scrap board
- Kiln
Instructions
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Look over the ceramic slip cast green ware stock on the shelves. Look for shallow bowl or plate forms. Purchase one that has a pleasing shape. Remember that the inside of the ceramic form will create the outside profile of your slumped glass piece.
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Place a 1/4 inch drill bit into an electric drill. Set the purchased green ware piece on a scrap piece of board. Place the drill bit on the bottom inside surface of the green ware form and carefully drill a hole all the way through the bottom of the form. Drill four to six holes. These holes will allow air to escape when the glass gets hot enough to slump.
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3
Put the ceramic green ware form in a kiln and bisque fire it between 1,915 to 1,971 degrees F for six to eight hours. Let the kiln cool slowly for 12 hours. The bisque fired form is now ready to be used as glass slump mold.
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Tips & Warnings
Stay away from slip cast forms that are deep like a cup. The glass won't slump that much.
Slip cast green ware is fragile, so take great care not to break the form when drilling holes into it.
