Copper Oxide Powder 20 gram Jar Makes Blue Bubbles When Fused CuO

Copper oxide for glass fusing. Makes blue bubbles when fused between two sheets of glass. 

• Known as black copper oxide, cupric oxide, or by the chemical formula CuO
• Particle size runs about 500 mesh (30 microns)

You will receive one 20 gram jar. The jar is lip balm sized. 

Important: Always use a NIOSH approved respirator when using powders. 

This hasn't been tested for purity for use in making cosmetics.

For a brief tutorial: https://rockymountainglasscrafts.com/blogs/news/sea-life-ocean-wave-using-copper-oxide-also-makes-a-great-plate