What causes carbon coring in clays?

What causes carbon coring in clays?

From For Flux Sake by Kathy King, Rose Katz, Matt Katz

March 4, 2026 · 37 min · Season 5 · Episode 124

About this episode

The episode discusses carbon coring in clays, its causes, and related studio practices.

What is carbon coring, and should we care about it? The term is actually a misnomer, with the real culprit being iron, a common ingredient in reduction fired clays. Today the gang talk about the phenomenon along with questions about kiln safety, and best studio practices for kids and pets. Do you have questions or need advice on glazes? Drop us a line at ForFluxSakePodcast@gmail.com and you could be featured on an upcoming show. Are you coming to NCECA? Look for Matt and Rose at the Ceramic Materials Workshop booth and Kathy at the Harvard Ceramic booth in the expo hall. Hope to see you there. Have you checked out the new For Flux Sake Patreon? This is a great way to show your support and have access to discounted merch, live hangouts, and extra episodes. Head over to Patreon and sign up today. Today's episode is brought to you by Monkey Stuff , The Rosenfield Collection , Cornell Studio Supply , and Ceramic Materials Workshop's Making Glaze Make Sense . This week's episode features the following topics: Carbon coring, red iron oxide, black iron oxide, reduction, stoneware clay

People in this episode

Hosts: Kathy King, Rose Katz, Matt Katz

Topics covered

  • carbon coring
  • iron oxide
  • kiln safety
  • studio practices
  • glazes

Keywords

  • carbon coring
  • iron
  • reduction fired clays
  • kiln safety
  • studio practices
  • glazes

Sponsors

Monkey Stuff, The Rosenfield Collection, Cornell Studio Supply, Ceramic Materials Workshop

Mentioned in this episode

Organizations: For Flux Sake

Books & works: Making Glaze Make Sense

Places: Harvard

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