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PODCAST

For Flux Sake

Kathy King, Rose Katz, Matt Katz

Matt and Rose Katz of the Ceramics Materials Workshop and Kathy King of the Ceramics Program at Harvard University discuss listener questions about clay and glaze. This show will have you laughing and learning about the chemistry behind ceramics in no time.

arts visual arts

All Episodes

29:54

Are ceramic sealers safe to use on functional ceramics?

For Flux Sake ·

2025/05/14

Today we return to the much loved topic of glaze durability on For Flux Sake. Kathy, Matt, and Rose start by talking about the long term durability of Bristol glazes. Then they delve into listener questions about ceramic sealers and substituting for Gerstley Borate in Raku glazes. 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. This week’s episode features the following topics: Glaze durability, Bristol

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28:03

Episode 100!

For Flux Sake ·

2025/05/07

Today we are celebrating the 100th episode of For Flux Sake! We’d like to thank the listeners for their excellent questions and for following along as the show has evolved over the last four years. To start this episode Kathy, Matt, and Rose share a few things they have learned making the show. They also answer listener questions about aging your glazes and single firing. Do you have questions or need advice on glazes? Drop us a line at ForFluxSakePodcast@gmail.com and you could be featured on an

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41:25

Fluxed Up with Susan Feagin

For Flux Sake ·

2025/04/23

Get ready for a wild ride in the studio with ceramic artist Susan Feagin! In this episode of our Fluxed Up series, we dive into the precarious world of ceramics filled with personal stories, studio mishaps, and the ever-elusive perfect glaze. Join us as Susan shares funny stories about working at the Penland School of Craft, as well as how she creates brightly colored slips for soda firing. Tune in for a dose of humor, technical tips, and a behind-the-scenes look at the life of a ceramic artist. Got

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31:58

When do glazes actually melt during the firing?

For Flux Sake ·

2025/04/17

Have you ever wondered when the magic happens during the firing? This week on the show the gang talk about the last 100 degrees C of the firing when glazes generally do their melting. They also answer a listener's question about thermocouples placement, and take a trip to Materials Corner to talk about Frit 3110. 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. This week’s episode features the following

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35:58

Who are we?

For Flux Sake ·

2025/04/09

This show has been going on for so long that the gang thought they should reintroduce themselves. Kathy, Matt, and Rose start the show talking about the experiences that lead them into a life of clay. They also answer a listener's question about calcining clay. 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. This week’s episode features the following topics: Kaolin, calcining, Alfred, Connecticut College

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37:47

Fluxed Up with Meredith Host

For Flux Sake ·

2025/03/25

Get ready for a wild ride in the studio with ceramic artist Meredith Host! In this episode of our Fluxed Up series, we dive into the precarious world of ceramics filled with personal stories, studio mishaps, and the ever-elusive perfect glaze. Join us as Meredith shares about working with decals and layered underglaze, as well as how she had to pivot away from her favorite glaze in the middle of a major commission. Tune in for a dose of humor, technical tips, and a behind-the-scenes look at the life

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31:46

What should we know about cristobalite and quartz...

For Flux Sake ·

2025/03/06

Cristobalite and quartz inversion are the great boogie men of ceramics, often being used to explain cracking clay, glaze fit issues, and general ceramic mayhem. In this episode the gang sort fact from fiction and explain the changes that silica goes through during firing. They also start the episode talking about Matt’s amazing new computer keyboard, which has beautiful celadon-glazed porcelain keys. Do you have questions or need advice on glazes? Drop us a line at ForFluxSakePodcast@gmail.com and

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41:09

Fluxed Up with Paul Andrew Wandless

For Flux Sake ·

2025/02/20

Get ready for a wild ride in the studio with ceramic artist Paul Andrew Wandless! In this episode of our Fluxed Up series, we dive into the precarious world of ceramics filled with personal stories, studio mishaps, and the ever-elusive perfect glaze. Join us as Paul shares about making casting slips out of dark clay bodies, as well as how he builds with cast slabs for extra strength and durability. Tune in for a dose of humor, technical tips, and a behind-the-scenes look at the life of a ceramic

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35:43

Are there budget-friendly black and purple glazes?

For Flux Sake ·

2025/02/13

Have you ever tried to create budget-friendly glazes? It can be hard, especially when you want rich purples and blacks. This week the gang talk about ways to save money in your glaze lab, and how tariffs might affect the supply chain. They also start the episode commiserating on how cold it is this time of year in New England, and what to do if your clay freezes. 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

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30:22

How can I measure thermal expansion?

For Flux Sake ·

2025/02/06

Have you noticed thermal expansion measurements on your clay or glaze recipes? If so you might be wondering what those measurements mean, and how you use them to predict glaze fit on a clay body. This week the gang discuss thermal expansion and why those numeric values aren’t always so helpful. They also answer a listener question about glazes with rare earth elements. Do you have questions or need advice on glazes? Drop us a line at ForFluxSakePodcast@gmail.com and you could be featured on an

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33:00

How can I get the best firing out of my new kiln?

For Flux Sake ·

2025/01/29

New kilns bring lots of excitement to the studio, but also a few questions. Should I calibrate my thermocouple? And, Do I need to adjust my firing rate to my new elements? This episode the gang talk about new kilns, ASTM standards for ware, and the difference between K23 and K26 soft bricks. They also start the show discussing testing methods for glaze durability. 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

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36:09

Fluxed Up with Pattie Chalmers

For Flux Sake ·

2025/01/22

Get ready for a wild ride in the studio with ceramic artist Pattie Chalmers! In this episode of our Fluxed Up series, we dive into the precarious world of ceramics filled with personal stories, studio mishaps, and the ever-elusive perfect glaze. Join us as Pattie shares a mishap with clay formulation, as well as how she teaches her students at Southern Illinois University Carbondale to be resourceful in the glaze lab. Tune in for a dose of humor, technical tips, and a behind-the-scenes look at the

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34:26

What’s up with all those pinholes?

For Flux Sake ·

2025/01/15

Pin holes are a pesky issue in ceramics, largely because multiple glaze defects are often called pinholes. The gang talk about the myriad issues with pinholes, and if you can fix them on an already fired pot. They also discuss why commercial glazes have wide firing ranges. They start the show laughing and questioning the existence of removable ceramic stickers. 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

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30:12

How can I make a speckled clay body?

For Flux Sake ·

2024/12/18

Speckled clay bodies have come roaring back in popularity and in this episode our intrepid clay experts talk about what you can add to your clay body to create this phenomenon. They also talk about plucking and why potassium fluxes are best for clay bodies. To start the show the gang introduce the mysterious case of the A.I. glaze book. 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. As the end of the

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33:34

Do I have to glaze my pieces?

For Flux Sake ·

2024/12/11

Today’s episode features a simple question. Do I have to glaze my pieces? The FFS gang talk about unglazed surfaces, and also discuss what triggers vitrification during firing. To start the episode, they also gab about Producer Ben’s new book on low-fire glazes for potters and sculptors. 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. This week’s episode features the following topics: Low fire,

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32:26

How do you make ceramic bakeware?

For Flux Sake ·

2024/12/04

Have you ever wanted to bake bread in one of your pots? Today the gang answer a listener's question about the best way to make ceramic bakeware. They also discuss a new trend in environmental design and why using sodium fluxes in clay bodies can cause trouble when reclaiming clay. 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. This week’s episode features the following topics: Bread, Sourdough, bakeware,

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39:35

Fluxed Up with Osa Atoe

For Flux Sake ·

2024/11/27

Get ready for a wild ride in the studio with ceramic artist Osa Atoe! In this episode of our Fluxed Up series, we dive into the precarious world of ceramics filled with personal stories, studio mishaps, and the ever-elusive perfect glaze. Join us as Osa shares her experience with letting go of a favorite glaze combo, and how this encouraged her to explore wild clay terra sigs. Tune in for a dose of humor, technical tips, and a behind-the-scenes look at the life of a ceramic artist. Got questions or

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37:42

Bentonite versus Epsom Salts?

For Flux Sake ·

2024/11/20

Do you have the hard pan blues when your glazes settle like a rock to the bottom of the bucket? The gang talk about how bentonite and Epsom Salts might solve hard panning, as well as when and how much you should use. They also talk about how to calcine a substance, and why you shouldn’t calcine egg shells as a calcium source. This week’s episode features the following topics: Bentonite, Epsom Salts, calcine, calcium carbonate versus calcium oxide, glaze suspension, glaze settling For today's

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42:31

Why is this glaze so gloopy?

For Flux Sake ·

2024/11/13

Have you ever mixed a glaze with the correct amount of water, but it still seems gloopy and thick? If you have then you might need to add a dispersant to help solve this issue. The gang talk about using dispersants, and they answer a listener’s question about the robustness of cone six versus cone ten. They also return to Materials Corner to talk about the discontinuation of a popular luster brand. This week’s episode features the following topics: Gillespie Borate, Bentonite, Darvan, sodium

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38:42

Why do pots get hot in the microwave?

For Flux Sake ·

2024/11/04

Have you ever noticed how some pots get really hot in the microwave? The gang talk about why this happens, and answer a listener question about coloring reclaimed slop glaze. They also talk about glow in the dark glazes and Rose’s recent video about them on the CMW YouTube channel. 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. This week’s episode features the following topics: Glaze colorants, glow in

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124 results

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