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downtoearthpotter

Member Since 07 Feb 2013
Offline Last Active Nov 09 2013 09:52 PM
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Posts I've Made

In Topic: Glaze Sprayer

09 April 2013 - 11:50 PM

technically, you can use an automotive paint spray gun -- it doesn't have the ideal aperture size for large particles/glaze, but they definitely work if you sieve well and water down your glaze slightly. our studio has been using a $10 paint spray set a student bought at an auto parts store, and it's been in use for several years without any issues as long as it gets cleaned out each use. personally, i like to use the Critter spray gun. I can't imagine it will be that difficult to find a spray gun in Australia. If you can't find one, look for online vendor - they will ship international unless they don't accept money...



Thanks for your reply, I have thought about a spray gun, however, thought the glaze would clog the nozzle. Will give it a try, you do mean one without a compressor, don't you?

In Topic: Australian substitute

09 February 2013 - 10:38 PM

Kentucky Ball (OM #4, Old Mine #4) clay is a very pure ball clay without iron or coloring contaminates. It was actually imported to Paris by the Sevres Porcelain factory prior to WWI according to people in Paducah , Kentucky. You could possible substitute an Australian Ball Clay that is very pure. If the purity (whiteness) is not a big issue, you may be able to use another less pure Ball clay. Talk to your suppliers for suggestions.

Marcia



Thank you for your suggestions.

In Topic: Australian substitute

09 February 2013 - 10:37 PM

Thank you so much for your reply. I will use this ball clay.

In Topic: Australian substitute

09 February 2013 - 10:35 PM


I have several glaze recipes which include american ingredients i.e. "kentucky ball clay (OM 4). I have never seen this listed in our suppliers catalogues, does anyone know what I can substitute for this? I would like to do some tests. Thanks. PS I live in Australia.


Of the 3 main Ball Clays available in Australia (Ball Clay FX, Ball Clay R and Clay Ceram) Ball Clay FX has a very similar Chemical analysis. The TiO2 content is fractionally more whilst the Fe2O3 is slightly less. I have successfully substituted Ball Clay FX for OM#4 in glazes tests. However which ever you choose should be tested first as analysis change depending on what part of the pit is being mined.

I have found the Glaze Program Matrix by New Zealand ceramist Lawrence Ewing to be spot on. This program has analysis of all the main materials used in Australia. It's database of materials used world wide is extensive. It is really easy to substitute Australian materials for materials used elsewhere and make the necessary adjustments. It is the best money I have spent on glaze calculation programs for my needs in Australia.

Johanna