99. How to Measure Specific Gravity (SG) for Pottery Glazes

If you are mixing your own pottery glazes one of the challenges to get the right mix between dry materials and water - and to end up with a glaze that have the right viscosity so the perfect layer of glaze materials is left on your pottery.

There are several ways you can measure pottery glazes. In this video I will show the 3 most common ways to do this.

The most accurate way to measure pottery glazes is using Specific Gravity. Many think this is too geeky and difficult. But it does not have to be.

In this video I will show you are very sime, easy and cheap way to measure Specific Gravity for your pottery glazes and how you can adjust them to get the right viscosity using fluctuation or de-fluctuation materials.

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INDEX:

00:00 How to mix the right pottery glaze
01:10 3 ways to measure pottery glaze
01:52 Using a hydrometer to measure pottery glazes
04:00 Using Specific Gravity (SG) to measure pottery glazes
04:52 Tools to measure Specific Gravity
05:33 Calibrating your Specific Gravity tool
07:21 Testing the Specific Gravity of a pottery glaze
10:37 Using water to adjust the Specific Gravity of the glaze
13:05 The problem with adding too much water to the glaze
13:54 Dealing with flucuated glazes - glazes that are too thick
14:19 Using defluctuation to make the glaze thinner
16:55 What is the right Specific Gravity for your pottery glaze?
17:30 In summary - the tools and method ti measure Specific Gravity (SG)