Take control of your glaze thickness

This course will teach you how to adjust your glazes and control their thickness in a way that you can repeat over and over again

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Course curriculum

  • 1

    Module 1: Taking Control of Your Glaze Results

    • Welcome to the course!
    • Introduction
    • Expectations and Experimentation
    • Taking Notes, Taking Pictures
  • 2

    Module 2: Glaze Application Thickness

    • Factors that Affect Application Thickness
    • Bisque Porosity
    • Application Methods
    • Specific Gravity
    • Viscosity and Absorbent Materials
    • Flocculation and Deflocculation
    • How to Convert Kaolin to Calcined Kaolin
    • Module 2 Recap
  • 3

    Module 3: Tools and Materials

    • Volume Measuring Container
    • Scales and Mixing Devices
    • Flocculants and Deflocculants
  • 4

    Module 4: How To Measure and Adjust Specific Gravity

    • How to Measure Specific Gravity
    • Steps for Measuring Specific Gravity - download
    • How to Determine Your Target Specific Gravity
    • Scenarios Where Specific Gravity Might Need Adjusting
    • Steps for Adjusting Specific Gravity
  • 5

    Module 5: How to Assess and Adjust Viscosity

    • Assessing Glaze Viscosity
    • Epsom Salts and Vinegar, Darvan and Sodium Silicate
    • How to Flocculate
    • Steps for Flocculating - download
    • How to Deflocculate
    • Steps for Deflocculating - download
    • Scenarios Where Flocculation May Need Adjusting
  • 6

    Module 6: Glaze Testing Methods

    • Determining Your Glaze's Sweet Spot
    • Glaze Test Examples
  • 7

    Module 7: Flocculation and Deflocculation Experiments

    • Intro to the Experiments
    • Flocculation and Deflocculation Experiments - download
    • Clay slip + Darvan
    • Clay slip + Sodium Silicate - over-deflocculated
    • High Frit glaze + Vinegar
    • High Absorbent Materials glaze + Darvan
    • No Clay glaze - Hard Panned + Epsom Salts
    • High Clay glaze + Vinegar
  • 8

    Module 8: Bonus Specific Gravity Videos

    • Facebook Live - Measuring Specific Gravity #1
    • Facebook Live - Measuring Specific Gravity #2
    • Measuring Specific Gravity and Flocculating

Course Schedule

This course will be released in 2 parts. The first part covers the WHAT and WHY of Specific Gravity and Flocculation. The second part covers HOW to use these techniques in your studio. Once all videos are released, you'll have ongoing access to them and all future updates.

  • Apr 8: Modules 1-3

  • Apr 15: Modules 4-6

DIY Program

Take the course independently.

  • Forever access to course videos and updates

  • Learn at your own pace and watch lessons as often as you want

Guided Group Program

Join fellow ceramic artists and learn from each other as you complete the course together. Receive guidance from Sue by way of a private discussion forum and weekly live Q&A sessions.

  • Forever access to course videos and updates

  • Learn at your own pace and watch lessons as often as you want

  • Private 'students only' Facebook group that will grow each time I launch the course

  • In-course discussion (in case you're not on Facebook)

  • 3 live video Q&A sessions with Sue

  • If you join the Guided Group Program now, you will be invited to participate in all future live Q&A sessions, each time I lauch the course

Specific Gravity and Flocculation

Learn how to adjust the water content and viscosity of your glazes so your results are better and more consistent

Join the Waitlist

Meet Your Instructor

Sue McLeod

Sue McLeod

Sue is a studio potter from Victoria, BC, Canada. She has been the ceramics studio technician at a community studio since 2015 and has been teaching workshops on ceramic glaze chemistry since 2017. ~~~ Sue received a diploma in Clay from Kootenay School of the Arts in 2010. Between 2014 and 2017 she took online clay and glaze chemistry courses through Alfred University. ~~~ Sue gave a talk at the 2018 NCECA conference in Pittsburgh where she presented her research on cone 6 glazes. ~~~ It is Sue's goal to make ceramic glaze chemistry accessible to everyone.