The Middle Glazes

The Story Of Mid-Temperature Glazes

Workshop Overview

The Middle Glazes is a comprehensive, 54-part study into Mid-Temperature glazes. Also known as Cone 6 or Cone 5-6, these glazes are one of the most popular firing temperatures in ceramics. They can be beautiful, enticing, engaging and incredibly frustrating. In this workshop we will explore in depth, what we know to make the most out of Mid-Temperature glazes.

We will take the mystery of materials, formulas and firings and translate them for real working artists. Some of the topics we will explore: What is a glaze?, What is Cone 6?, Chemistry basics, Glaze chemistry, Materials, Understanding glaze formulas, Understanding cone 6 formulas, How temperature works, Glaze mapping (prediction), Matte glazes and fake matte, Glaze durability, Converting Cone 10 glazes, Effects, Identifying Cone 6 glazes, Altering glazes, Problems with Cone 6, and even more! Join us and we will change your work, forever.

Cost:  $150

Sample Video

We Explore:

Part 1

  • ​Introduction
  • The History of Temperature
  • What is Cone 10?
  • Temperature Problem
  • Why Cone 6?
  • What is Glass?

Part 2

  • What is a Glaze?
  • Periodic Table Basics
  • Silica and Alumina
  • Fluxes
  • How Fluxes Work
  • Understanding Formulas

Part 3

  • Why Glazes Work
  • Reading Stull’s Map
  • Matte Glazes
  • How Cone 6 Works?
  • 20×5 Analysis
  • 20×5 Variations

Part 4

  • Down Town
  • Cones and Temperatures
  • Temperature and Stull
  • How Lowering Temperature Works
  • Boron
  • Boron Chemistry

Part 5

  • Borate Materials
  • Gerstley Borate
  • ​Frits
  • Recreating Stull’s Map
  • Mapping Comprehensive
  • 20×5 Chemical Match

Part 6

  • Matte Glazes 2 ^6
  • Matte Mapping
  • Fake Matte
  • Testing a Fake Matte Glaze
  • Converting a Fake Matte Glaze
  • Crystallization

Part 7

  • Titanium and Nickel
  • Cooling
  • Bristol Glazes
  • Bristol Glaze Chemistry
  • Bristol-Leah Leitson Chun
  • Other Methods for Temperature

Part 8

  • Reduction
  • Fluxes and Temperature
  • What Makes Glazes Weak
  • Lithium Carbonate
  • Boron and Durability
  • Identifying Cone 6 Glazes

Part 9

  • Alabama Rain Analysis
  • Temperature Conversion
  • Temperature Conversion-Blue
  • Temperature Conversion-Turquoise Matte
  • Chrome Tin Red Conversion
  • Cone 6 Clay Bodies


Course Reviews

What Students are Saying


“I have just finished your Middle Glazes online workshop, and wanted to drop you a line to say thank you. Matt, I will miss you talking to me on my screen – but more importantly, I have learned so much! I have a totally new approach to glazes (and clay bodies) and so many insights… now I just need to put them into practice, and try and remember all the amazing things I have learned. I am busy printing out reminders to dot around my studio!”


Ruth G. – Student – Nov 2021

Workshop Bundle

Enroll in All 3 of CMW’s Workshops and Save $50!

We have bundled our students’ favorite workshops together. Glaze of Our Lives, The Middle Glazes and Glazed & Confused are great for beginners and give a solid introduction to glazes and how they work.

Frequently Asked Questions

Answers to Your Most Pressing Questions

Are you going to talk about…

Let me stop you there. We are going to talk about EVERYTHING.

Temperatures? Yes? Glaze flaws? You bet your buttons. Atmosphere? You better believe it. Materials? No way around it. At the end of this course, you will have a thorough understanding of ALL aspects of clays.

How long does the class run?

Students have immediate, lifetime access.

How does this “Online Class” thing work?

The Middle Glazes is a comprehensive, 54 part study into Mid-Temperature glazes. They are all on demand lectures, with no time limit. Watch them as many times as you want.

Science? Are you going to make me learn chemistry?

Yes! Ceramics are chemical reactions, and to understand them, we have to understand chemistry.

Have no fear, part of how we teach is to craft information to make it relevant and understandable for you.

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