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eoteceramics

Strange brown specks !

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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 

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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.

eoteceramics and D.M.Ernst like this

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