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The Lost Wax Method for Cast Glass

Take a brief look at how I use the lost wax method for creating my cast glass items.

Creating clay sculpture
  1. Here, I have used clay to create my item - a leaf sculpture.

Create silicone mould

2. Using 100% silicone, I create what could be a re-useable mould. I cover the item thoroughly, leaving an aperture for the wax to be poured in. Once set, I remove the clay from the mould.

Create wax mould

3. I pour the wax into the mould and leave it to solidify. Once set, I remove the wax form from the silicone mould.

I do any adjustments or refining of the wax now, as what is in the wax will transfer to the glass work.

4. I weigh the item; this is required to work out the glass total.

Create plaster mould & set up kiln

5. Using silica, plaster, and water, I cover the mould with at least three layers to create a strong plaster mould for the kiln. Leaving an opening that allows the molten glass to enter the piece. Remembering to wear a mask.

6. Next is removing the wax from the plaster mould using a wallpaper steamer inside a makeshift hot box. This creates enough heat for the wax to melt and leave the mould. If there is any residue, I wash with hot and cold water.

7. I do the calculation for glass following the guidelines for the glass I use.

8. This is my kiln set up for these particular items. I utilise terracotta pots placed above the opening on props.

Remove plaster from glass

9. Here is a completed kiln load. They are now ready to remove the plaster. Always remembering to watch my fingers for the sharp bits and also remembering to wear my mask.

Finish your glass piece

10. Now, it is time to decide how I would like to finish the item. Due to having arthritic hands, I chose to sandblast with garnet as it helps speed up the initial sanding process. I followed with the diamond sanding pads to create the finish.

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