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Member Since 15 Mar 2013
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#89306 Are There Any Laws Of Pottery?

Posted by jrgpots on 22 July 2015 - 10:51 AM

1. Accidental happenstance always seem to look better than engineered intention.

2.  demands and deadlines propotionally  increase ware distruction and disasters.



As to the austalian abbreviations, following Earthfan's examples....would pottery experts be potties?




#89305 Woo Yellow Strontium Carbinate Substitute?

Posted by jrgpots on 22 July 2015 - 10:34 AM

I have a lot of chemicals shipping in. Just order some from a different supplier.
http://www.bigcerami...ntium carbonate


Thank you for the links to your suppiers.  I have used big ceramic store in the past with great success.   St George, Utah is a small town and the local supplier just changed ownership. So there are a few hickups in transition.  Raw materials were part of that hickup.... There are only a few of us who make our own glazes around here, so the raw materials were put on the back shelf during the transition.   .BUT they do have EPK... TJR.



SO from the responses, I get the feeling that there is no great substitution for Strontium.... I guess i will have to wait for the supply truck.



#89007 Meat Grinder As Pugmill?

Posted by jrgpots on 16 July 2015 - 11:20 AM

I get my slop and trimming buckets really wet, make a slurry, and stir with electric drill paddle. the thick slurry goes in canvas bags which are hung and drip dried. I store the clay in 5 gallon buckets with a wet rag on top and lids on.

I dig local clay and use the same process.

I tried the meat grinder. The housing for the auger cracked. It was one of many disasters I choose not to admit to owning... There a microbiology term that descibes the amount of disasters....TMTC...(too many to count)...


#88833 Gas Kiln Design

Posted by jrgpots on 13 July 2015 - 11:10 AM

I agree. close the top center hole, add a damper at the bottom of the chimney and make chimney taller to improve draft.


#88718 Any Flashers Out There?

Posted by jrgpots on 11 July 2015 - 11:36 AM

Look at Marcia Selsor's gallery here in the forum for her saggar fired pots. She has beautiful results flashing all kinds of oxides. She would be an ultimate resource.

The late Paul Soldner did a lot of "flashing" in his studio. Of course that was a different time.


#87709 Qotw: Are You A Thrower Or A Hand Builder?

Posted by jrgpots on 24 June 2015 - 01:22 AM

Slab work comes easier to me. But I do throw a lot of pieces...into the recycle bucket.


#86989 Which Slug Do You Like Best?

Posted by jrgpots on 12 June 2015 - 12:01 AM

I think your slugs are cute... We used to control our banana slugs with salt. So that made me wonder how your slugs would do in a salt kiln....lol


#86988 Magic Box Damp Box What A Type Of Plaster?

Posted by jrgpots on 11 June 2015 - 11:51 PM

I used all pupose plaster of paris in my box. No problems so far. My box is 32x19.5 13.75 deep. It is a "Sterilite" 105 Qt container with snap lid. I put 1.5" of plaster in the base. It worked well for slab building.


#86601 This Old House...gingerbread Style

Posted by jrgpots on 06 June 2015 - 01:01 AM

I thought I would give people a view of my gingerbread church.  The tile are all on. I have spent the last two days making 10  1.5" x 4.5" stained glass panels and two 2.5" round window panels.  I have to put the lights in the sucker and finish out the ground.   I'm slow at it.  I have transferred the church onto a 30" x 26" piece of maple plywood.   The thing weighs about 35 lbs.  Next time I'm going smaller.



I'd appreciate suggestions on how to dress it up.




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#85940 Making Very Fine Lines!

Posted by jrgpots on 02 June 2015 - 12:01 AM

... When I started using the zinc free clear all the weirdness went away... Well all the weirdness concerning the colors at least the general weirdness of my life is still in force. LOL

Based on what you have just said, I think I have major Zinc defeciency......lol

#85938 Life Expectancy Of Ceramics

Posted by jrgpots on 01 June 2015 - 11:56 PM

My Lladro lasted about three years after my oldest started to walking. The museum pieces were lucky to be sold to people without young children or grandchildren in the home. In my experience, the life span of any piece is directly proportional to the age of the children around the studio/home.


#79185 Iron Speckles

Posted by jrgpots on 12 April 2015 - 08:50 PM

I remember an organic chem lab I had to take. I made vanilla crystals which normally are large and white. Mine were small and green. The size came from being too much in a hurry. I can buy that....But the green color? The mass spectrometer showed copper in the mix. It turned out that I used an old chrome plated scoop to measure ans stir my soln. The chrome had worn off and the copper metal was exposed to the acidic solution. The result...green crystals.

It comes to mind every time I have an unusual outcome. When it comes to glaze making, it is ever present on my mind.

Just reflections.


#78822 Iron Speckles

Posted by jrgpots on 07 April 2015 - 11:08 PM

Wallastonite can have many impurities,such as garnet as mentioned in digitalfire. Could this be the source of your specks? I would try a different source of this ingredient.

That's my guess.

  • Min likes this

#77632 New Copper Carb A Way Different Color!

Posted by jrgpots on 18 March 2015 - 11:52 PM

Trying to remember my geology, Malachite, Cu2Co3(OH)2, is a mint green and azurite,Cu3(CO3)2(OH)2 is bright blue. Both are forms of copper carbonate. The differences in color comes from the differences in % of each of these two. Of the two, azurite has more Cu per molecular weight. That would mean that the mint green color has more Cu by weight. It would make sense that glaze colors would change as well.

I went out to the garage and found this ore sample. The light green is malachite while the deeper blue is azurite. Both exist in the same ore sample.

Like always, test, test, test.


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#76031 *gasp* Handle Sacrilege!

Posted by jrgpots on 24 February 2015 - 01:38 AM

Also, another reason I enjoy pulled handles, is because I get to demonstrate it straight-faced, to a group of teenagers, while watching them try to not laugh...[/quote]

If you wanted to make them laugh, cover it with a condom to dry. You could Segway into clay shrinkage at the same time....lol