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sylvia (UK)

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About sylvia (UK)

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    Stockport, UK
  1. Oh, bad luck, Grayfree! We had -17 (Celsius) here in the middle of the UK last winter (a record!), and even though I keep a heater on frost-setting overnight in the studio, next morning I found a whole day's mugs standing with frost crystals on the surface. I feared the worst so scrapped them, saving just one for the sake of experiment, and guess what? It was fine. (Grr!) The surface was very finely dimpled but I processed it as usual (turned a foot-ring, pulled a handle, fired and glazed it) and it was indistinguishable from the normal run. I must just have been lucky that the surface frost hadn't got into the body properly - or unlucky, as I consigned the rest of the day's work to the recycling bin!!
  2. Pressing too hard's not good - there's a risk you might remove clay instead of truly compressing it. Do you turn your thrown ware? (Or trim, as I believe people the other side of the Atlantic call it!) Stresses can be set up in the clay if the pot's too dry, and/or the tool's not sharp enough, and/or you put too much pressure on the unsupported base. The turnings should have the texture of grated Cheddar - any crumblier and you're creating a drag which will exacerbate any underlying compression problem. Good luck!
  3. The pot looks as if it's salt-glazed - which makes sense since for an application like this you really don't want any dodgy chemicals in a glaze. You might find a local salt-glazer and ask him/her to put your weighting stone into their next firing? Another possibility is to clean the existing one by sticking it in the kiln and burning off any stubborn bits! Glass-slumping temperatures should be high enough to do that.
  4. Yup. We spend time discussing the persistent "ceramic myths" with our students sometimes. Fun topic. best, ............john Would you, please, consider starting a new thread about classic myths? Apart from any formal training, we must all have done a lot of learning by example and word of mouth so goodness knows how many mythological gems we might inadvertantly have ingested! I'd be very grateful, and it might amuse the cognoscenti ! Cheers, Sylvia
  5. Thank you Marcia ! Here in the UK we've had the worst two winters since I started potting and it never occurred to me to try firing fish-scaled pots. And to think I scrapped 40 mugs (with pulled handles!) last year...
  6. Carboxymethyl Cellulose - if you put it in a search engine you'll get chapter and verse. Cheers Sylvia
  7. I was faced with a vast quantity of running glaze when I did a locum at an art centre where the users didn't know they had to stir all the way to the bottom of the bucket. I stirred what was left properly, measured out half a litre of slop, sieved 5g of flint and 5g of china clay into it. (This was a stab at getting somewhere close to 5% of dry ingredients). Was ready to try 20g per litre if necessary but the first stab at it worked a treat. Good luck! Sylvia
  8. Hi Joanzag For masking you might also try trailing glue from a glue gun, and the kind of stickers kids use. Sylvia
  9. I swear by Emmanuel Cooper's rule of thumb for runny glazes: either reduce the flux or increase both silica and alumina. So however much flint you add, add the same amount of china clay. He recommends starting off with 5% and increasing if necessary. Hope this helps Happy potting!
  10. Hello

    I'm a potter living and working in Stockport, UK. I throw and I'm a self-confessed glaze geek. Can't stop experimenting!

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