Firing Media Coal Carbon - Rainbow Patina - 5lb Bulk

Use this coal-based, acid-washed activated carbon to embed metal clay pieces for firing if you want to create a more richly colorful patina on pieces during the firing process. To prepare the carbon for use, place it inside the container, cover with the lid and fire for 30 minutes at 1,550°F.

Click here to download a PDF version of our Gemstones in Metal Clay article for tips and hints for firing gemstones in carbon.