For Flux Sake

Have you ever wondered why kilns have peep holes? Today Matt, Rose, and Kathy debate the function and necessity of peep holes, while also tackling a question about glazing only the interior of a pot. They also start the episode talking about the research Kathy is doing at Harvard Ceramics into the historic use of graphite as a ceramic sealer. Do you have questions or need advice on glazes? Drop us a line at [email protected] and you could be featured on an upcoming show.
 
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:
Peep hole, kiln venting, glaze tension, glaze compression, dunting, vitrification

Happy New Year! To start 2026 the gang answer listener questions about ash glazes, mixing brushing and dipping glazes, and how the particle size of colorants affects glaze outcomes. They also begin the episode sharing stories about the highs and lows of art center holiday sales. Do you have questions or need advice on glazes? Drop us a line at [email protected] and you could be featured on an upcoming show.
 
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:
Ash, Fake Ash, colorant, particle size, holiday sale, brushing glaze, dipping glaze

Have you wondered what makes a glaze food safe? Today we are happy to welcome Gabriel Kline and Bill Collins to the show to talk about the topic, and their new book Amazing Glaze: Food Safe Recipes. They discuss the definition of food safety, how to test glazes, and what they learned after testing dozens of popular cone 6 and cone 10 recipes.
 
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:
Food safety, leaching, crazing, cone 6, cone 10, shino, phase separation

Do you fire your kiln fast or slow? And does it really matter? Today the gang answer a few listener questions about the relationship between temperature, glaze melt, and vitrification. They also discuss a class of clays out of the UK that vitrify at low fire temperatures. 
 
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:
Firing rate, glaze melt, shino, cone 6, cone 8, vitrification

Commercial casting slips are great for their convenience, but what do you do when your recipe hard-pans in the bucket? Today the gang talk about why hard-panning happens and how you can fix it. They also discuss making temp checks, the best bisque temp for commercial glazes, and the controversy around the sale of fake ceramic pigments.
 
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:
Materials corner, hard-panning, casting slip, commercial glaze, temp checks,