How to Measure the Specific Gravity of Your Glazes

Video Tutorial

In this video I demonstrate how to measure the specific gravity of a glaze I just mixed using a graduated cylinder and a scale.

Measuring specific gravity is a way to calculate the water content of a glaze to ensure that each time you glaze, you have the same amount of water.


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Join my free community

If you love learning about and discussing glazes, I'd like to invite you to my free social learning Facebook group called Understanding Glazes with Sue. The group is full of videos and discussions about firing, mixing glazes and fixing various glaze issues. Please join!

5 Ways You Can Make Your Glazes More Amazing (using glaze chemistry)

If you’ve ever wished your glaze could be just a little more…

  • cost effective
  • green/red/blue/purple
  • compatible with your other glazes
  • matte/glossy
  • stable/fluid

… then you don’t want to miss this free class!

Date: Sep 21, 2023

Time: 10:00am Pacific / 1:00pm Eastern / 6:00pm UK time.

A replay will be available to watch for a limited time if you can't make it live.

The Art of Glaze Chemistry

Learn how glazes are formulated by using the UMF (unity molecular formula) and glaze calculation software to:

  • create different glaze surfaces like matte, satin or glossy
  • get glazes to melt at different temperatures or ensure your glaze is being fired to the right temp
  • create durable, functional glazes
  • fine tune the colours of your glazes
  • fix crazing and other thermal expansion issues

This is a deep dive into all the chemistry that's happening inside the kiln.

Registration open Sep 21-29, 2023.

Learn to Mix Glazes from Scratch

If you’ve never mixed a glaze from scratch before and want to learn, I teach an online workshop called Glaze Mixing Essentials where I show you all the steps to mix a glaze and then test a base glaze with multiple colourants. Click the link for all the details.

September sale: Save $30 if you register by Sep 30, 2023.