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1515art

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  1. Like
    1515art reacted to CactusPots in Plaster mold making problems   
    I've been using Vaseline in turpentine for mold release.  Got the tip from a mold master.  Seems to be the ticket. 
  2. Like
    1515art reacted to Rae Reich in Re-glazing high-fired pieces   
    Also, do not get the piece to be refired wet!! Sometimes moisture gets into the body and comes out explosively when heated quickly, as one might do with a refire. If it has gotten wet, place in an oven at the lowest possible temperature for several hours, or heat your refiring kiln very slowly. 
  3. Like
    1515art got a reaction from Rae Reich in Re-glazing high-fired pieces   
    I’ve done it many times with mostly positive results, the difficulty is getting a sufficient enough layer of new glaze material to stick to the previously glazed vetrified piece. I’ve never used hair spray although have read it can help the glaze to adheare, if the piece is small enough I’ll put it in the microwave for a minute or two that will do 2 things , heat the surface a little and neutralize some of the surface oil from things like oil transferred from skin contact. Otherwise I’ll heat it with an electric heat gun, Then  work quickly while the piece is warm.  Use a loaded brush, a soft touch and try to avoid going over areas a second time as repeated brush strokes will begin to work against you. You will have to practice a little to get the feel, luckily if it fails to apply like you like it’s very easy to rinse off the newly applied glaze and start over.
  4. Like
    1515art got a reaction from Min in Re-glazing high-fired pieces   
    I’ve done it many times with mostly positive results, the difficulty is getting a sufficient enough layer of new glaze material to stick to the previously glazed vetrified piece. I’ve never used hair spray although have read it can help the glaze to adheare, if the piece is small enough I’ll put it in the microwave for a minute or two that will do 2 things , heat the surface a little and neutralize some of the surface oil from things like oil transferred from skin contact. Otherwise I’ll heat it with an electric heat gun, Then  work quickly while the piece is warm.  Use a loaded brush, a soft touch and try to avoid going over areas a second time as repeated brush strokes will begin to work against you. You will have to practice a little to get the feel, luckily if it fails to apply like you like it’s very easy to rinse off the newly applied glaze and start over.
  5. Like
    1515art got a reaction from Momo in Re-glazing high-fired pieces   
    I’ve done it many times with mostly positive results, the difficulty is getting a sufficient enough layer of new glaze material to stick to the previously glazed vetrified piece. I’ve never used hair spray although have read it can help the glaze to adheare, if the piece is small enough I’ll put it in the microwave for a minute or two that will do 2 things , heat the surface a little and neutralize some of the surface oil from things like oil transferred from skin contact. Otherwise I’ll heat it with an electric heat gun, Then  work quickly while the piece is warm.  Use a loaded brush, a soft touch and try to avoid going over areas a second time as repeated brush strokes will begin to work against you. You will have to practice a little to get the feel, luckily if it fails to apply like you like it’s very easy to rinse off the newly applied glaze and start over.
  6. Like
    1515art got a reaction from Rae Reich in Stool/chair Height?   
    The chairs do not have casters the legs have flat pads on the bottoms.
  7. Like
    1515art reacted to Pres in Stool/chair Height?   
    I think that a variable height stool really works best. My reasoning for this is for the many different positions you might find yourself in when throwing. If you throw off the hump, you may be more comfortable with a higher seat, but as the clay gets lower, you find you are bending over too much. Trimming may require different heights, I don't like to get my arms too far past perpendicular to the wheel at the level of the pot bottom. So think about the types of chairs that would give you multiple heights. One of my favorites is:
     

    This type of stool allows variable height, and the angle of the stool actually supports your body and pushes you slightly forward.
     
    best,
    Pres
  8. Like
    1515art got a reaction from Rae Reich in Removal of rough iron pieces on stoneware fired BRT   
    Specifically, I use an old camel,back bladder it has the bag (naturally), hose,  valve, a hook to hang  and a snip of the mouthpiece with a diagonal cutter makes the nozzle. Holds plenty of water and you have great control over the drip. If you have access to medical supplies an iv drip works too.
  9. Like
    1515art got a reaction from Rae Reich in Removal of rough iron pieces on stoneware fired BRT   
    I really like the idea of grinding wet to eliminate dust issues, I’ll have to pick up a suitable diamond abrasive wheel, I’ve glued wet sanding disks to old throwing bats but their useful life is short. I did lapidary work many years ago and we used a flat lap that didn’t seem much different than a wheel head with a 1” lip to dress the backside of polished stones a much more involved version of Hulks method. 
    Sometimes I’ll chuck a finished piece on my giffen grip and hang a bag of water over the wheel head to provide a steady drip of water then use a diamond burr while spinning the ceramic ware on the wheel. Not the easiest way to go about finishing the bottoms, but if I’m not in production mode I’ve saved a few glaze disasters and am able to produce very clean edges with glazes that like/need to run and have smoothed bottoms with it.
  10. Like
    1515art got a reaction from Hulk in Removal of rough iron pieces on stoneware fired BRT   
    Specifically, I use an old camel,back bladder it has the bag (naturally), hose,  valve, a hook to hang  and a snip of the mouthpiece with a diagonal cutter makes the nozzle. Holds plenty of water and you have great control over the drip. If you have access to medical supplies an iv drip works too.
  11. Like
    1515art got a reaction from Hulk in Removal of rough iron pieces on stoneware fired BRT   
    I really like the idea of grinding wet to eliminate dust issues, I’ll have to pick up a suitable diamond abrasive wheel, I’ve glued wet sanding disks to old throwing bats but their useful life is short. I did lapidary work many years ago and we used a flat lap that didn’t seem much different than a wheel head with a 1” lip to dress the backside of polished stones a much more involved version of Hulks method. 
    Sometimes I’ll chuck a finished piece on my giffen grip and hang a bag of water over the wheel head to provide a steady drip of water then use a diamond burr while spinning the ceramic ware on the wheel. Not the easiest way to go about finishing the bottoms, but if I’m not in production mode I’ve saved a few glaze disasters and am able to produce very clean edges with glazes that like/need to run and have smoothed bottoms with it.
  12. Like
    1515art reacted to Babs in Removal of rough iron pieces on stoneware fired BRT   
    Grinding is an option.There have been a few posts about what people use.
    Some crystal glazers gribd all the time.
    Diamond disc attached to wheel. Carboradum bitheads or stones.
    Eye protection and mask would be essential
  13. Like
    1515art reacted to Mark C. in Removal of rough iron pieces on stoneware fired BRT   
    Have you tried wire wheeling the bottoms-(bench grnder fited with a wire wheel.)works great on most stoneware
  14. Like
    1515art reacted to Hulk in Removal of rough iron pieces on stoneware fired BRT   
    Hi Alice,
    I've glued 6" diamond wheel to a bat (my least favorite bat, which can still be used for clay, flipped over...) for polishing feet - works great! I run the wheel at a moderate speed, wet. The sludge (wet dust) likely wouldn't change how my clay behaves - I'm cleaning up before and after anyway.
    A courser grit would probably be better; this was so inexpensive tho'
     

  15. Like
    1515art got a reaction from Pres in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    George, thank you for the information interesting piece, I was more focused in it’s recent history how you came to own it and I’m guessing it’s been to a few experts or evaluations? You have knowledge of it and knowing some of that history will help, I’d imagine there are concerns beyond damage to just the kiln, any work being fired within the near proximity to your  jar should it react unexpectedly would be in jeopardy.  Another issue to consider, many copies are produced and have been for a very long time as I’m sure you are aware and it’s important to be certain of the materials used in the process of making it and their temperature range. It could be fired in it’s own sagger even then I think you are going to invest  many times it’s retail decorative value in the process. Shipping will be expensive to and from China and you need to be aware of customs restrictions on antiquities some things going in can’t come back out.
  16. Like
    1515art got a reaction from Rae Reich in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    George, thank you for the information interesting piece, I was more focused in it’s recent history how you came to own it and I’m guessing it’s been to a few experts or evaluations? You have knowledge of it and knowing some of that history will help, I’d imagine there are concerns beyond damage to just the kiln, any work being fired within the near proximity to your  jar should it react unexpectedly would be in jeopardy.  Another issue to consider, many copies are produced and have been for a very long time as I’m sure you are aware and it’s important to be certain of the materials used in the process of making it and their temperature range. It could be fired in it’s own sagger even then I think you are going to invest  many times it’s retail decorative value in the process. Shipping will be expensive to and from China and you need to be aware of customs restrictions on antiquities some things going in can’t come back out.
  17. Like
    1515art got a reaction from Rae Reich in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    Also this site is very active with many experts in all Asian art and is open (slow response time) to all interested in Asian art no membership.
     
    https://www.asianart.com/phpforum/index.php
  18. Like
    1515art got a reaction from LeeU in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    George, thank you for the information interesting piece, I was more focused in it’s recent history how you came to own it and I’m guessing it’s been to a few experts or evaluations? You have knowledge of it and knowing some of that history will help, I’d imagine there are concerns beyond damage to just the kiln, any work being fired within the near proximity to your  jar should it react unexpectedly would be in jeopardy.  Another issue to consider, many copies are produced and have been for a very long time as I’m sure you are aware and it’s important to be certain of the materials used in the process of making it and their temperature range. It could be fired in it’s own sagger even then I think you are going to invest  many times it’s retail decorative value in the process. Shipping will be expensive to and from China and you need to be aware of customs restrictions on antiquities some things going in can’t come back out.
  19. Like
    1515art got a reaction from georgeingraham in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    What are your travel limitations?  Firing in China? I can’t say if anyone would be interested in your piece not personally knowing enough on those works but I have many friends and connections with experts across China and can ask the question and possibly get you valuable information on the various aspects of your decision should the piece be valuable enough to generate interest and if no one cares you are probably just fine doing with it as you wish. 
    PM me if you want me to ask
    clark
  20. Like
    1515art got a reaction from georgeingraham in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    Also this site is very active with many experts in all Asian art and is open (slow response time) to all interested in Asian art no membership.
     
    https://www.asianart.com/phpforum/index.php
  21. Like
    1515art got a reaction from georgeingraham in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    george, can you tell us it’s history and How you can be certain of its authenticity and origin? Im also wondering why you believe it will have more than decorative value after refiring assuming it survives? 
  22. Like
    1515art got a reaction from georgeingraham in Firing Song Dynasty Chinese Funerary Jar / Spokane Washington   
    George, thank you for the information interesting piece, I was more focused in it’s recent history how you came to own it and I’m guessing it’s been to a few experts or evaluations? You have knowledge of it and knowing some of that history will help, I’d imagine there are concerns beyond damage to just the kiln, any work being fired within the near proximity to your  jar should it react unexpectedly would be in jeopardy.  Another issue to consider, many copies are produced and have been for a very long time as I’m sure you are aware and it’s important to be certain of the materials used in the process of making it and their temperature range. It could be fired in it’s own sagger even then I think you are going to invest  many times it’s retail decorative value in the process. Shipping will be expensive to and from China and you need to be aware of customs restrictions on antiquities some things going in can’t come back out.
  23. Like
    1515art got a reaction from Rae Reich in Simple DIY sink clay trap   
    Lol, if only my dirt had enough gold where that was a factor and actually the golds never supposed to get that far as the settling tanks are only for the soil/clay suspended in the water when the waters to dirty the fine gold won’t settle fast enough in the sluice and then it will be lost in the tailings.
  24. Like
    1515art got a reaction from Rae Reich in Simple DIY sink clay trap   
    I was amazed how well this worked when I saw a guy using it moving water between tubs, some ancient technique for watering crops or something like that .  JohnnyK is right and this isn’t for everyone and if I was concerned about an accidental overflow I would drop the whole thing down into a water tight box and add a p trap at the end. I’m using it inside my studio this way for now and my clay water is diverted outside into the garden and waters the hedges so the traps not needed.  The water level between the first and second tanks stays very close and the third tank is slightly lower. I think the large diameter pipe has little friction loss at this volume so the siphon action with atmospheric pressure keeps it fairly level. The tubes are 4 or 5 inches off the bottom so I think it will hold at least a gallon or two of sediment.


     
  25. Like
    1515art got a reaction from Rae Reich in Simple DIY sink clay trap   
    I thought I’d share a trick I picked up for separating mud from water while running a recirculating power sluice looking for gold. The same system seems to work well for the sink drain in my studio, it works off of some simple hydraulics and siphons water from tank to tank giving the heavy particles time to settle before exiting the tanks.
     
    I used three 5gal trash bins and connected them using 2” ABS, each connector was made from one 2” U joint, two 2” elbow and two 8” long nipples. The drain is one 2” ABS adaptor and a 2” sink drain gasket and one 24” long ABS nipple, everything glued with medium ABS cement. The elbow on the bottom allows you to fill the tubes and submerse them into the tanks while maintaining the siphon in the connecting tubes. Total cost for everything from Home Depot was under $50 and build time under an hour.
     
    The system easily handles the volume of the water as it drains directly down into the first bin and when the bin is at capacity with solids it is simple to remove, empty and replace. The design allows infinite number of settling bins and any size and shape of container pretty much can be adapted to work, so I think this could be made from a variety of free parts.





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