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Ceramic Materials Workshop - Matt Katz Ceramic Materials Education

CMW Blog

How we trim our test tiles!

7/20/2022

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CMW Kiln Opening

7/13/2022

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Rose opens our kiln and reviews some new tests in our lab
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What makes crystalline glazes?

7/7/2022

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Energy Usage and Kilns

7/6/2022

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In this series of videos, we are testing the amount of energy that flows through our test kiln.
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Ceramic Materials Workshop Current Course Offerings!

7/1/2022

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Ceramic Materials Workshop currently offers 3 types of online glaze and clay courses to fit our students' schedules and learning styles!   

1)  CMW Full Courses - Our most popular interactive option! 
  • Understanding Glazes – Introductory course on glazes and how they work.  Offered 4 times each year in January, April, July and October.  All levels of students welcome.   
  • Introduction to Clay Bodies – Learn about the science behind clay bodies.  Offered 2 times each year in January and July.   All levels of students welcome.   
  • Advancing Glazes – Next level course to learn about glazes.  Offered 4 times each year in January, April, July and October.  All students must have taken the full course of Understanding Glazes in order to take this course. 
  • Crystal Ball (coming Oct 2022) - New course that focuses on microcrystalline glazes.   Offered 2 times each year in April and October.  All students must have taken the full course of Understanding Glazes in order to take this course. 
All Full Courses Include: 
  • 4 months of access to course materials beginning on 1st day of course 
  • On demand weekly lectures - can stop and start and rewind to re-watch 
  • Hands On Lab Experiments and Testing 
  • Live Q&A Discussions with Matt 
 
2)  CMW Lectures Only Courses - Great option for students with limited time! 
  • Understanding Glazes – Comprehensive introductory course on glazes and how they work.   All levels of students welcome.   
  • Introduction to Clay Bodies – Learn about the science behind clay bodies.   All levels of students welcome.   
  • Advancing Glazes – Next level course to learn about glazes.   All students must have taken the Lectures Only course of Understanding Glazes in order to take this course. 
  • Lectures Only Bundle – Includes 3 Lectures Only Courses – Understanding Glazes, Introduction to Clay Bodies, Advancing Glazes – for a great price. 
  • Crystal Ball (Coming Jan 2023) - New course that focuses on microcrystalline glazes.  All students must have taken the Lectures Only course of Understanding Glazes in order to take this course. 
All Lectures Only Courses Include: 
  • 4 months of immediate access to lectures upon enrollment 
  • On demand lectures – can stop and start and rewind to re-watch 
  • Option to upgrade to future Full Course for difference in tuition + $100 processing fee 
 
3)  CMW Workshops – Perfect for students who want to learn on their own schedule! 
  • Glaze of Our Lives – Beginner introduction course to glazes and how they work 
  • The Middle Glazes – Cone 06 course that focuses on mid-temperature glazes. 
  • Glazed and Confused – Learn about the Unity Molecular Formula - UMF 
  • Workshop Bundle – Includes all 3 CMW Workshops – Glaze of Our Lives, The Middle Glazes, Glazed and Confused – for a great price. 
All Workshops Include: 
  • Immediate, unlimited, lifetime access 
  • On demand lectures – can stop and start and rewind to re-watch ​


​Visit our website for more information www.ceramicmaterialsworkshop.com or email us at info@ceramicmaterialsworkshop.com

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Talk About Tin Video

6/29/2022

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Hello!  We are Rose & Matt Katz

6/29/2022

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Since it's been awhile since we did an intro, we thought it would be a good time to introduce ourselves again!

We met as students at Alfred University where we were both studying ceramic art. After school Rose went to work as a glaze designer in the tile industry and Matt studied ceramic engineering from an artist’s perspective at Alfred and took up teaching glaze chemistry at the school.

We started CMW 5.5 years ago to help bring the classes that we developed for teaching at the university to the wider world. Our main goal was to slay all the myths and rumors that permeate ceramics and use ceramic science to help the community make their work the best it can be.

We believe that learning how the chemistry of glazes works will ultimately have a profound effect on your studio and we want to show you how to do it.

Over the last 5+ years, we've taught over 5,500 classes to over 3,500 students! There is SO much we want to share with you, so we hope that you decide to start your glaze journey with us soon!

"See" you all soon!
-Matt & Rose

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Video on opacifiers in glazes

6/24/2022

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More Talk About Tin...

6/22/2022

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More Tin talk...one more example of what Tin does.

These are the same glaze, again made without Tin on the right, adding Tin to the same batch on the left. This time, the glaze is just increasing the level of opacity.

As we said in earlier post today, when we opacify a glaze, aside from making it white, it tends to make glazes “pastel” which is color theory terms, meant to mix a glaze with white. Which lightens the overall appearance.

One thing to mention...We are hearing through the grape vine, that Tin prices are about to skyrocket. So if you use a lot of Tin on your work, it may be time to invest.

Start your glaze chemistry learning today!  Visit www.ceramicmaterialsworkshop.com today!

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Conversations about Tin Oxide (SnO2) - Part II

6/8/2022

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Continuing on the conversation about Tin!

Copper Red glazes are interesting as they often contain a lot more Tin than Copper. We’ve seen formula that will have 0.5% Copper and 6x or more Tin.

These two glazes are from the same batch. The tile on the right is without Tin. We then added the Tin, and applied a second tile, which is on the left. Both were then fired in the same reduction firing.

Why?

Well, the copper makes the red, Copper is reduced down to colloidal copper (ultra small) this looks when suspended in a glass. That much is clear.

One theory on why the tin is included is that it opacifies the glaze, which makes the red more intense. That doesn’t quite work conceptually, as opacifiers tend to change the colors they are mixed with, into pastel colors.

One theory pro-ported by Tschane, in his book copper red glazes, is that it is the reduced behavior of tin that enables the red. Most materials, when reduced, want to reoxidize while still in the firing. The idea is that Tin will reoxidize before cooper, and in that process strips all of the remaining oxygen from the copper, giving it an even more bold color. This behavior is also why the “oxidation flash” in copper red firings is valuable.

Our student Mel @a_fizzy_dilu has found some studies that validate this concept.

Start learning about your glazes today!  Visit www.ceramicmaterialsworkshop.com for more information on our courses. 
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    Matthew and Rose Katz - Founders of Ceramic Materials Workshop

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Copyright © 2018
  • Home
  • Understanding Glazes
    • Our Comprehensive Glaze Class
    • FAQ
  • Crystal Ball
  • Intro to Clays Online
    • Our Clay Class
    • FAQ
  • Glaze of Our Lives
    • Our Beginner Workshop
  • The Middle Glazes
    • Our Cone 6 Workshop
    • FAQ
  • Glazed and Confused
    • Our UMF Workshop
  • Workshop Bundle
  • Lectures Only Bundle
  • Advancing Glazes
    • About our Advancing Class
  • Which Class Should I Take?
  • CMW Student Login
  • Reviews
  • About
    • Us
    • Contact
    • Mailing List
  • Newsletters
  • For Flux Sake Podcast
  • CMW Blog
    • Blog List >
      • Retired Blogs >
        • YouTube
  • UMF Calculators
    • Other Calculators
    • Reports & Publications
  • Resources
    • Glazy.org
    • Social Media >
      • Slipcast Blog
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      • Twitter
      • Linkedin
  • Merch & Gift Certificates
  • Support CMW
    • Donate
    • PayPal Subscription
  • Terms of Use
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