Biglou13 Posted January 10, 2014 Report Share Posted January 10, 2014 What parameters must be met for a clay body meet to be a "porcelain" Both mid cone 6 ish Higher fired 10redux. And 10 plus woodfired? Link to comment Share on other sites More sharing options...
Biglou13 Posted January 10, 2014 Author Report Share Posted January 10, 2014 I was thinking along the lines percentage of kaolin...... Granted the standard formula is 25% kaolin 25% ball 25% silica 25% spar In lower temp "porcelains". The kaolin percentage drops. At what point is just a white body? Is there a rule? I've see different absorption/ vtirification rates. (Usually lower than stoneware) I've read where a porcelain is < 3 % yet other manufacturers have higher rates with their porcelains?? Link to comment Share on other sites More sharing options...
neilestrick Posted January 11, 2014 Report Share Posted January 11, 2014 I was thinking along the lines percentage of kaolin...... Granted the standard formula is 25% kaolin 25% ball 25% silica 25% spar In lower temp "porcelains". The kaolin percentage drops. At what point is just a white body? Is there a rule? I've see different absorption/ vtirification rates. (Usually lower than stoneware) I've read where a porcelain is < 3 % yet other manufacturers have higher rates with their porcelains?? Porcelain does not have ball clay. That's the difference between white stoneware and porcelain. Link to comment Share on other sites More sharing options...
Guest JBaymore Posted January 11, 2014 Report Share Posted January 11, 2014 I understand the High Council of Potters is investigating her. Sssssssssssshhhhhhhhhhhhhhhhh..... don't let her know. best, ..........................john Link to comment Share on other sites More sharing options...
Guest JBaymore Posted January 11, 2014 Report Share Posted January 11, 2014 Traditional Chinese porcealin was made of only two mateials.... a kaolin and ptunse stone. BTW...... a lot of Chinese porcelains were thrown VERY thickly, and then trimmed insuide and out to thinness. The clay body could not be thrown thin. best, .......................john Link to comment Share on other sites More sharing options...
Matt Oz Posted January 11, 2014 Report Share Posted January 11, 2014 Try this spelling, I assume it's the same stuff: petuntse, this seems to be the common spelling. On Digitalfire its petunse. I'd wish someone could provide Digitalfire a breakdown of Ptunse, if just for historical reference purposes. Traditional Chinese porcelain was made of only two materials.... a kaolin and ptunse stone. BTW...... a lot of Chinese porcelains were thrown VERY thickly, and then trimmed inside and out to thinness. The clay body could not be thrown thin. best, .......................john Link to comment Share on other sites More sharing options...
Guest JBaymore Posted January 11, 2014 Report Share Posted January 11, 2014 Sorry about the typo there leading you astray. Yeah... that's the stuff. Literal translation is "White block of stone". (useful, huh? ) Labor in China is and always was cheap..... and most porcelains were / are produced in a far more factory-like settings that us studio potters are really used to (strong division of labor) so trimming them likely was easier than improving the body . There were/are throwers... and trimmers. Each exteremely skilled at that they did/do. best, ........................john Link to comment Share on other sites More sharing options...
Babs Posted January 12, 2014 Report Share Posted January 12, 2014 Each exteremely skilled at that they did/do. best, ........................john Hey is that more skilled than extremely?? Just checking to see if I have to keep working at the throwing exercises until I become exteremely skilled or just stop at the extremely skilled level? Chris well she should be inverstigated.. she delights in failing! Link to comment Share on other sites More sharing options...
Guest JBaymore Posted January 12, 2014 Report Share Posted January 12, 2014 Chris well she should be inverstigated.. she delights in failing! Is that looking at her upside down, inside out, or backward? best, .......................john Link to comment Share on other sites More sharing options...
Babs Posted January 12, 2014 Report Share Posted January 12, 2014 Chris well she should be inverstigated.. she delights in failing! Is that looking at her upside down, inside out, or backward? best, .......................john my excuse is when I was at school we were still writing on bits of slate and using whiting for making marks, haven't really become used to this keyboard thingie. From here, in the Antipodes, I think she is inverstigated!!, looking from down under. IF TJR can use "whale" as a verb, that leaves it wide open! Link to comment Share on other sites More sharing options...
Babs Posted January 13, 2014 Report Share Posted January 13, 2014 Apologies to TJR, reading a bit of Alice Munro's writing tonight, Canadian writer, and she writes of being whaled by her Dad, I presume that means hit pretty hard?? Great imagery in that word. Don't stand in the way of anyone in a whaling mood. Link to comment Share on other sites More sharing options...
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