Underglaze Mix  - Cone six

F4 Soda Spar 44 units
EPK Kaolin 22  units
Ball Clay 11 units
Frit 3124 22 units
I usually mix about two Kilos of this mix and place it in a large plastic pickle jar. I place the lid on the jar and then roll it about the studio for a while to mix the ingredients well.

Whenever I need a color under-glaze I use 5 parts of dry mix to one part stain. I add water and mix well and let decant overnight.  The next morning I pour off the excess water and the slip is ready to use.  I might add a few drops of water as the slip thickens during my painting session.

I cannot remember where I got this recipe.  I think it was from one of my Ceramic Monthly editions years ago.  The artist who gave the recipe use the dry mix with a liquid mix consisting of 30 Grams of Gum to 128 oz of water  to be use in the liquit part of the mix.

Then One would mix 1000 cc of antifreeze (non toxic) with 1000 cc of water and to this one would add 500cc ot the gum mix.

I tried this but found the smell during firing to be too strong even with my ventilation.

ABOUT Terrance

Terrance is a retired Canadian Armed Forces Logistic Officer who traded his military uniform for a potter's wheel, when he retired in 1991.

Terry is presently working out of his studio, located in Longueuil, (St-Hubert,) Quebec, Canada.  You can find out more about him  here.


A QUICK UNDER-GLAZE MIX Mi have found that when I fired Alberta slip to cone six in an electric kiln the result was a clear glassy surface with a very, very light tinge of yellow.  it was hardly noticeable.  So I started using Alberta slip in the ratio of 5 parts Alberta slip to one part cobalt and this gave me a very good under-glaze slip.  When ever I am in a hurry and I am going to use a dark colour pigment I will use this mix.  It works. 


MY COLLECTION OF  ARTICLES               I From time to time I find a great article written by a artist in the ceramic community.  When I find on that I believe will assist my fellow potters and ceramicist I will publish it on my site.   You are invited to submit articles for publication.