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for the glaze gurus
This one is for all the glaze gurus and experts out there;
I acquired some glaze (in a bucket - premixed) from a woman who retired from pottery. It is a beautiful creamy white BUT is very touchy. It cracks and flakes off my bisque and if I don't carefully smooth all the hairline cracks before firing it ends up with unglazed pot bits showing (I know there is a technical name for it but I'm not a morning person and my brain ain't workin' yet). I do not know the recipe for this glaze and though I contacted the potter, she could not help me either. Is there anything I can do to help this glaze stick to my pots better? Thin it? Thicken it? Add something? It is a lovely white and so soft to the touch when it comes out right but that is only about 1/3 of the time. Thanks in advance. ~~~~~~~~~~~~ Penni Stoddart of Penelope's Pots Full Time Education Assistant, Part Time Potter You're just jealous because the voices only talk to me. I'm not a complete idiot -- some parts are missing! |
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#2
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If you have some bentonite, blend some in a blender with water, and try adding
some of that--it shouldn't change the character of the glaze itself, but may improve adherence. Can't say as to quantity--relates to the bucket size. The other traditional cure for touchy glazes is called CMC gum (in Britain SCMC gum) , and it makes it sticky. Hamers' Potter's dictionary says of it up to 3% (dry weight percentage, which would be considerably lighter than wet weight) can be added to the glaze. I think the same could be said of Bentonite. Brad Sondahl. Clayslinger wrote: This one is for all the glaze gurus and experts out there; I acquired some glaze (in a bucket - premixed) from a woman who retired from pottery. It is a beautiful creamy white BUT is very touchy. It cracks and flakes off my bisque and if I don't carefully smooth all the hairline cracks before firing it ends up with unglazed pot bits showing (I know there is a technical name for it but I'm not a morning person and my brain ain't workin' yet). I do not know the recipe for this glaze and though I contacted the potter, she could not help me either. Is there anything I can do to help this glaze stick to my pots better? Thin it? Thicken it? Add something? It is a lovely white and so soft to the touch when it comes out right but that is only about 1/3 of the time. Thanks in advance. ~~~~~~~~~~~~ Penni Stoddart of Penelope's Pots Full Time Education Assistant, Part Time Potter You're just jealous because the voices only talk to me. I'm not a complete idiot -- some parts are missing! -- For original art, music, pottery, and literature, visit my homepage http://sondahl.com Pottery sales page http://sondahl.freeyellow.com My music site at mp3.com http://www.mp3.com/stations/sondahl |
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I have a rule for my refrigerator contents that is probably just as good for glazes to be used on functional wa When in doubt, throw it out! Jan C. |
#5
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"ShambhalaPottery" wrote in message ... Just a bit of a warning. It's not a good idea to use a glaze without knowing what's in it, at least not on functional ware. You don't say what temperature this glaze is maturing; but if it's a low fire glaze, it could have lead in it. Fair warning but....... The glaze I got is for cone 6 and was used on functional ware by the lady I received it from. The only reason she is not sure of the exact recipe is because she would regularly "tweak" her glazes and left a styrofoam piece with a code of sorts floating in the glaze. I pitched the foam (not knowing what it meant) and now can't retrieve the exact recipe. I know it does not have lead though (I asked). Thanks for the replies and help. ~~~~~~~~~~~~ Penni Stoddart of Penelope's Pots Full Time Education Assistant, Part Time Potter You're just jealous because the voices only talk to me. I'm not a complete idiot -- some parts are missing! |
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