Copper Oxide

Glass Application- Black Glass

Copper oxide or cupric oxide is a black glass pigment used in soda, lime, and silica glass colouration. It’s milled to an ultra-fine powder to allow for thorough dispersal during mixing, which eliminates speckling.

  • Fine milling provides smooth and even colour
  • Can be used to produce emerald and black glass on the same line
  • Black colour is exposed during striking



  • Contains 95%-99% CuO
  • Dry bulk density: 2.6 untapped
  • 98% below 75 micron/200 mesh


General Information

The black colouration of copper oxide comes out after the annealing process when the bottles are heated to a higher temperature (600°C-650°C) to expose the latent colour. This is known as “striking”. Black glass can be made with copper oxide on the same production line as emerald glass by striking only the portion that requires black pigmentation.


Choose the packaging and shipping arrangement that best suits your needs, from small packaging to bulk bags or custom sizes made just for you. We can accommodate virtually any size, from one metric ton to thousands.


We maintain competitive pricing in an effort to win and retain your business for as long as you need us. Our goal is to meet the needs of every customer, including those with special requests and demanding production schedules.

A 15-day general turnaround for manufacturing allows us to get your compounds to you as quickly as possible, so you can keep up with the demands of your business. Contact us to get in touch with a distributor in your area if you don’t have time to wait for materials.

We currently ship to 44 countries across the world and we’re happy to ship to yours, too. The dependable and professional logistics channels we have in place make it easy to offer great pricing and service regardless of your location.

African Pegmatite

With 48 years as professionals in mining and manufacturing, we have the insight, network, and experience to offer you the very best in quality, service, and efficiency. We’ve been accredited by the ISO 9001 since 2002 and have most recently met the 2015 standard.

We aim to provide the very best materials available to our customers, and become your one-stop shop for colourants, minerals, compounds, and more. Take a look at our general glass page to see all the other glass and supplementary products we have available.

If you’d like to become a distributor of African Pegmatite products, get in touch with us and we’ll customise an arrangement with you.