Making Molds for Glass Bottle Stoppers and Glass Feet

I threw several rings to make a glass foot for the ceramic bowls and plates. I also made several stoppers for preparation of the glass stoppers.

I place the forms into a bed of clay at the leather hard stage and apply mold soap to all clay showing that acts as a resist for the plaster. The mold soap ensures that the plaster will not stick to the form and is able to be released freely.

I then encase the pieces with the cottle boards and brush the mold soap on the boards as well.

Once I measure the width length and diameter of the pieces I can measure my material for the plaster and pour the plaster in.

I apply the same method to the foot rings.

The mold is now set up and ready to be turned over.

Here is the reversal side of the mold.

I take out all the clay inside the forms so that I can stack the glass on top of the mold and let it drip through the holes during the firing.

Here is the mold for the foot rings