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Min

Member Since 31 Mar 2010
Offline Last Active May 20 2015 05:10 PM
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Posts I've Made

In Topic: Finally! I Am Learning To Post Pictures!

20 May 2015 - 05:04 PM

bruce, i am sorry that i do not read chemical formulas. please, what does this really mean in ordinary terms?

 

just in case Bruce doesn't see this I'll jump in. In ordinary terms Roy reformulated it and his version was tested for cobalt leaching and Hesselbreth says it should be okay for functional pots. The main change Roy made was decrease the cobalt and add a titch of strontium.

Roy's recipe as on the link Bruce posted is:

 

Ferro Frit 3134............. 37.00
Custer Feldspar............. 16.00

Strontium Carbonate......... 4.00

EP Kaolin................... 26.00
Silica...................... 17.00

Cobalt Carbonate............ 2.50
Rutile...................... 4.50
=========
107.00


In Topic: Really Over Firing A Bisque!

18 May 2015 - 12:30 PM

Hi AndreaB53 and welcome!

 

Not sure if I'm understanding how you fired, did run it at 960 (C or F) for 8 hours? Did you have any witness cones in the kiln? Is the clay earthenware?

 

Not very scientific but try touching a pot with the tip of your tongue, if it sticks a bit then the clay is still porous enough to glaze. If it doesn't stick at all then you will have hard time with getting a good even coat of glaze to stick to the pot. If it is overfired and not porous you can try heating the pots up to around 200 and then very quickly glaze them, if you have access to spraying the pots that would probably be the easiest. It's a crap shoot and the results are not usually as good. Are there any bloats? If you only got to 960F then refire to what you normally bisque to.


In Topic: It's Too Big..she Said

15 May 2015 - 11:34 PM

Customer comes into my tent and sees my lazy susan set. It was a lazy susan with a sign on it saying "Lazy Susan" so people knew it wasn't just a platter. She very loudly said "Well, how do you think that would make Susan feel?" She was super indignant and stomped away in a huff.

I've told this one before but it's still my favourite goofy customer comment.

In Topic: Glaze Testing

15 May 2015 - 02:09 PM

Don't beat yourself up over this, you learned something and in the grand scheme of things thats what counts. There are a gazillion horrible glaze recipes out there, some will say they are not food safe but most won't. 

 

3 part article on barium here:

 

http://www.claytimes...es/barium1.html

 

http://www.claytimes...es/barium2.html

 

http://www.claytimes...es/barium3.html


In Topic: Rolling Pins

14 May 2015 - 10:31 AM

I emailed the shop owner about having a custom large pin made, no extra cost for custom work sounds really good to me. I am just working out the design, will post back how it works out.

 

See attached design - is it ok?

You don't have to pay any additional cost for custom order. If you like it you can order any of the pin and write in message that you would like this one. 

We used it on clay and it was ok but the clay shouldn't be very sticky.