eoteceramics Posted October 10, 2017 Report Share Posted October 10, 2017 Hi all If anyone can identify these funny brown specks I'd appreciate it. They are on a white earthenware that I had fired up to 200C over a few hours and then candled I did this to eliminate the moisture as I had had big problems when firing before with explosions. I usually just bisque fire and haven't noticed these specks before. The slabs are resting on silica sand which I haven't used before either. Thanks Julia Link to comment Share on other sites More sharing options...
eoteceramics Posted October 10, 2017 Author Report Share Posted October 10, 2017 Sorry my photo won't load. They are like measals and cover all the slabs, look like they are in the clay. Julia Link to comment Share on other sites More sharing options...
neilestrick Posted October 10, 2017 Report Share Posted October 10, 2017 They're just organics burning out. Link to comment Share on other sites More sharing options...
Min Posted October 10, 2017 Report Share Posted October 10, 2017 Just as an aside, 200C / 390F is awfully hot to be candleing at. (around 85C / 185F and up to 93C / 200F works for me) Link to comment Share on other sites More sharing options...
neilestrick Posted October 10, 2017 Report Share Posted October 10, 2017 1 hour ago, Min said: Just as an aside, 200C / 390F is awfully hot to be candleing at. (around 85C / 185F and up to 93C / 200F works for me) I agree. The purpose of candling is to drive off the water before it has a chance to turn to steam. Once you're above 100C you're not really gaining anything by holding temp there, and the chances of blowing something up greatly increase. Link to comment Share on other sites More sharing options...
eoteceramics Posted October 12, 2017 Author Report Share Posted October 12, 2017 Thanks Guys, Im learning as I go Julia Link to comment Share on other sites More sharing options...
eoteceramics Posted October 12, 2017 Author Report Share Posted October 12, 2017 As always id be lost without this forum and all the expert advice. Just opened the kiln and the spots have been cured ( read burned out ) Thanks everybody Julia Link to comment Share on other sites More sharing options...
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