How to Keep Copper Inclusions from Oxidizing in Fused Glass


Copper makes a great inclusion when fused in glass, but it will oxidize and turn a dull red color during the fusing process. However, you can easily clean and prepare copper for inclusion in fused glass projects in a few simple steps.

Things You'll Need

  • Copper sheet or wire
  • Detergent soap
  • Pickle solution or lemon juice
  • Large pot or crock pot
  • Super Spray (or other product) or clear glass paint
  • Cut your copper sheet or wire to the shape you want for your inclusion.

  • Clean your copper by washing it with detergent and water.

  • Place the copper in a warm pickle solution bath in a large pot for about 15 minutes. You can use a commercial pickle designed for metalsmithing, or just use simple lemon juice. A small crock pot is an excellent tool for pickling copper.

  • Remove the copper item from the pickle using copper tongs to prevent getting any oils back on the cleaned copper. Pat dry with paper towels or use a hair dryer.

  • Coat the copper on both sides with Super Spray -- a commercially avaialble chemical compound -- or similar metal-treating product. Alternately, you can use a clear glass paint to coat and protect the copper. Spray or paint the copper in one direction, then spray or paint a second coat perpendicular to the first.

  • Allow the copper to dry, place your the inclusion within your fused glass design and fire according to your usual schedule.

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  • Photo Credit Hemera Technologies/ Images
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