Devit spray is used to prevent or minimize devitrification on your fused glass.
The liquid is sprayed or brushed on the glass before firing.
Some say that it can also be used to reverse devitrification by spraying and re-firing a piece.
This is done by cleaning the piece after sanding, then spraying and re-firing.
I have not tried this method, so I can't say whether or not it will work for your piece.
The brand name and most talked about product is called Super Spray.
This spray can be purchased on line or from your local glass store.
But, being crafty and saving some money, try making a similar product yourself.
Read below for more information.
1 Tablespoon Borax (yes, the kind mother use to use on your clothes)
1 Tablespoon dishwashing detergent
1 cup warm distilled water
Mix the borax with most of the warm water.Allow this mixture to settle and then add pour just the liquid into another container. Throw out any residue that might be at the bottom of the mixture.
Mix the dish washing detergent with the rest of the water and add to the borax and water mixture.You can mix the ingredients in a glass jar with a lid and shake to mix. Label the jar and shake before each usage. Brush or spray this solution on your glass pieces before placing them in the kiln for firing.
Please note: A larger quantity can be made by using 1 cup of dish washing liquid, 1 gallon of distilled water, and 1 cup of borax.
Wash hands after mixing and using this product.
Exposure to borax can be harmful, so avoid any long term exposure.
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Fused Glass Supplies
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Devit Spray to Glass Fusing Made Easy