Hi all, Yesterday I machine pugged some re-claimed clay (as usual), but noticed that the clay's properties werent smooth. The clay could be 'torn' and was ragged when done so.
When I pug my clay - I put it through the machine several times to make sure its the same consistency throughout.
Although I wedged it really well afterwards I just couldnt get it to feel right - almost as if it had lost its plasticity.
The throwing wasnt good either - the clay sounded as if it were a fizzy soft drink, and when inspected, appeared to have very minute bubble holes in the surface; almost like it had fermented.
I threw a bowl (almost to completion) and then the side actually tore apart when extending the diameter of the rim.
I'm really careful over re-claiming clay and as far as I know - I've been really careful not to contaminate the re-claimed clay in my slop bucket.
Anyone actually know whats going on here? I'm wondering if its going to be safe to fire otherwise I risk losing my other ware!!
JM (sporting yet another cold - sniff - where's those tissues)