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Member Since 10 Nov 2010
Offline Last Active Aug 19 2015 12:18 PM

#90797 Clay Contamination Or Something Else? (Long)

Posted by Ben on 13 August 2015 - 01:29 PM

Make a thin thin slip out of the clay and sieve it through as many grades of sieve as you have.

Sounds like a porcelain grog is in the clay.
  • Min likes this

#76689 Diy Dry Pressed Ceramic Tile?

Posted by Ben on 03 March 2015 - 03:00 PM

I've experimented with dry pressing small items. Inspired by "A Potters Alternative" i made a frame to capture my car floor jack and several molds to press both damp dust and moist slab items.

Damp dust is tricky. I was pressing pyrometric cones so the clay content was low. I think a binder as mentioned would be beneficial.

I have talked to a guy online doing this for tiles. His method for producing moist dust was semi dry greenware run through a hammer mill. That's another possibility to keep in mind.

Please keep us updated.

#76683 What Causes Glaze/clay 'tide Mark'?

Posted by Ben on 03 March 2015 - 02:26 PM

PRankin, definitely finger wiped but the color may be due to the thin layer of glaze left behind in the wiped places. Not necessarily an underglaze but not ruling it out either.

#62881 Granite For Wedging Tabletop/element Wire For Fixed Cut Wire ?

Posted by Ben on 20 July 2014 - 05:20 PM

Best cutoff wire I've used is multi stranded stainless fishing leader. Look for companies such as American Fishing Wire or similar.

Great stuff.

#40884 48Cuf Gas Kiln Help

Posted by Ben on 15 August 2013 - 07:53 PM

You know Mart,

You will get more flies with honey....

And you'll be more likely to get someone to follow your top quoting preferences if you reword your instructions.

I find your remark "extremely" objectionable and annoyingly off topic. 

You added nothing to solving the problem at hand as this is not an internet ettiquette discussion forum nor topic.



Looks like "Eeny, meeny, miny, moe" wil give the final answer to a young kiln builder :)

Fantastic indeed


BTW, it is EXTREMELY annoying when you "top quote" ;)


Please use:


quoted text


#40710 Drip Plate?

Posted by Ben on 13 August 2013 - 07:43 AM

Why use silica?

Wouldn't alumina hydrate be a better material to fill the drip plate with?

#38755 how to measure glaze consistency

Posted by Ben on 12 July 2013 - 11:15 AM

You are talking about a viscosity cup and as mentioned, viscosity and specific gravity are different and independent. You must regulate both to control how a glaze applies.

Specific gravity is most accurately measured using a gram scale. Balance the scale with an empty, dry 100ml or 1000ml graduated cylinder on it. These are available online for very little money.

Fill with well mixed glaze to either 100 ml or 1000ml and weigh. Water weighs 100 grams per 100ml. If the sample in the 100ml test weighs 127 grams the smaple has a specific gravity of 1.27.


The viscosity of the glaze can be affected by numerous factors and is measured by dipping the cup in and timing the time it takes to drain. 

How to adjust viscosity will be determined by the ingredients in the glaze.