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Rae Reich

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  1. Like
    Rae Reich reacted to Min in Am I applying bat wash correctly?   
    If it hasn't been fired on yet then yes it can be dusty. 
    It would just be a guess but the least expensive materials to use in a kiln/ batt wash would be kaolin and silica so if companies are trying to save money with the wash they supply they will load the wash up with that and skimp on alumina hydrate. There is a link below discussing kiln/batt wash with some tried and true recipes (it's towards the end of the link). Also, I would suggest wiping it back from the edge about 1 cm and wipe off any drips from the side of the shelf.
    https://community.ceramicartsdaily.org/topic/20981-frit-substitution-chart-orton-cone-charts-kiln-wash-recipes/
  2. Like
    Rae Reich reacted to Mark C. in Am I applying bat wash correctly?   
    I would make my own wash and remove with a wet sponge  before firing any commercial wash as it usually poor quality.
    Speaking of quailty wash I noticed on the Advancer shelve (kiln shelve.com ) site they use the same formula as I posted years ago
    1/2 alumina hydrate
    1/4 epk
    1/4 calcined EPK or (glowmax)
  3. Like
    Rae Reich reacted to Rebekah Krieger in slab plates center warping during glaze fire   
    Another tip would be to leave a “button” in the center bottom of the plate. You can find some images of Steven hills plates/platters to get the idea. 
  4. Like
    Rae Reich reacted to Bill Kielb in Cracks when double-bisquing large work ?   
    Just perhaps an easy thing to remember - Flat plates with a hole in them start off with a pretty distinctive stress concentration. Have seen many a clock face crack just like in the pictures above. Reinforcing around a hole can help with clay, just like many other materials, this pattern and fix are similar to help many materials survive this typical stress concentration around a hole - pictured below. We reinforce all holes in flat plates with some added uniform thickness or washer if you will. Since, along with good practices no longitudinal cracks in these clock face figures.

  5. Like
    Rae Reich reacted to Denice in Extreme Cracking/Shrinkage in Tiles   
    I see that there are some cracks running from one lump to another.  I make a lot of tile,   a thicker area next to a thinner slab can cause cracks to form.   She might try removing the clay from the back of the tile in the thick areas  and try to keep the clay a even thickness.  Denice
  6. Like
    Rae Reich reacted to neilestrick in Extreme Cracking/Shrinkage in Tiles   
    A waster slab should do the trick, or put some silica sand on the shelf. Make sure you put kiln wash or alumina wax on the waster slab so the tile doesn't stick to it. If you need a cooling ramp it would be during quartz inversion, so from about 1100 to 900, but it's rare that you would need that.
  7. Like
    Rae Reich reacted to Sandi0720 in Clay Shrinkage   
    Thank you so much!!! You made my day!!!
  8. Like
    Rae Reich reacted to neilestrick in Clay Shrinkage   
    There are always exceptions to the rule, but I would not recommend trying that again. Glad it worked out for you!
  9. Like
    Rae Reich reacted to neilestrick in Clay Shrinkage   
    Those shrinkage rates are more than close enough for what you're doing, and those numbers are way too precise. There will always be slight differences in shrinkage depending on the  accuracy of the firing, the thickness of the pieces, etc, so for them to give a number that precise is totally unnecessary. They basically have the same shrinkage rate.
  10. Like
    Rae Reich reacted to neilestrick in Never used Brent C, no noise in forward, noise but no spinning in reverse   
    Take off the bottom cover and see if the belt came off or broke. 
  11. Like
    Rae Reich reacted to Mark C. in What’s on your workbench?   
    Firing two glaze fires today still trying to appease the pit monster.I can now work 1/2 days before foot say no more.Spent many 1/2 days glazzing and loading up till todays firing. Spring mini heat wave yesterday (81 was the high and the low was 37) it's a 3 day deal.
  12. Like
    Rae Reich reacted to Hulk in What’s on your workbench?   
    Workbench has some recently glazed wares waiting on foot polishing, inspection, and washing; and some just handled raw wares as well.

    The test tiles are IMCO's new "Terry" clay.
  13. Like
    Rae Reich reacted to Denice in What’s on your workbench?   
    I am glad you are getting better,  I know that eight weeks is a long break for you.   I finished my radiation therapy on my skin cancer a month ago and it has finally healed.   I need to go buy a big straw hat for the summer.   Don't overdo it.      Denice
  14. Like
    Rae Reich reacted to Denice in QotW: What surprise have you found in your clay, either fresh or recycled?   
    I found what looked like a broken pugger tip in a bag of purchased clay.   In my own recycled clay I am always finding elephant ear sponges.    Denice
  15. Like
    Rae Reich reacted to LeeU in QotW: What surprise have you found in your clay, either fresh or recycled?   
    I am here to support the always interesting, always informative, always fun QotW and it's master Host.  As for surprizes in my clay---never, nada, nothin'.  Just here for support. 
  16. Like
    Rae Reich reacted to Katie S in Bisque Firing Porcelain - What Cone?   
    Oh the artist is well aware, I wouldn’t do anything without consulting her first. 
  17. Like
    Rae Reich reacted to LeeU in Bisque Firing Porcelain - What Cone?   
    No--nope--not  chance--not worth it. Taking such high risk with any kiln (and especially someone else's with other people's stuff it) is just plain looking for trouble.
  18. Like
    Rae Reich reacted to Bill Kielb in Spraying glaze with iron spangles   
    Have done this with automotive metal flake back in the day and used a gun with a stirring blade inside. That was a reliable way to distribute and spray with the viscosity needed for an automotive finish. A zebra striped metal flake auto not so desireable. Your finishes can be more random so it might be possible to suspend and spray acceptably. I have not tried anything other than spraying glaze very evenly but think it’s worth a try.
  19. Like
    Rae Reich reacted to neilestrick in Warped rims on my porcelain sculptures   
    Unless you make it considerably thicker, porcelain is going to warp with a form like that. 
  20. Like
    Rae Reich reacted to Roberta12 in Bisque Firing Porcelain - What Cone?   
    @Katie S I have become quite adamant about "what clay is it?"  Name, rank, serial number, when firing for others.  If they do not know, I politely decline.  A friend of mine just had a horrible kiln accident with that very thing.  Melted cups and plates all over the shelves.  Yes, they were low fire.  Fired to mid fire.  The person making the request didn't do their work.  You would probably be fine with 04,  probably.  But.....
  21. Like
    Rae Reich reacted to Katie S in Bisque Firing Porcelain - What Cone?   
    No! She's got a sculpture piece.  It's also not cast but has been hand built and carved.  She was clear that her pieces will be put on a shelf for display and did not intend to glaze them - but might change her mind.  Also got me thinking about cone 04 firing.
  22. Like
    Rae Reich reacted to Min in Bisque Firing Porcelain - What Cone?   
    If she isn’t absolutely 110% sure it’s a cone 10 clay then I would pass on this. 
    This makes sense to fire the clay to maturity / cone 10 if she doesn’t plan on glazing it and it is indeed a cone 10 clay. She might want to leave it as bare clay or be planning on doing a cold finish on it. Firing to maturity would be a clearer way to describe what she wants rather than calling it a bisque firing. A mature body is far stronger than a bisque fired body.
  23. Like
    Rae Reich reacted to PeterH in Warped rims on my porcelain sculptures   
    Yes, but it may introduce more problems than it solves.
    To my untutored eye it looks like firing with a sitter would probably solve your slumping issues.

    ... but would introduce glazing issues.
    The classic bone china solution uses a supported high-fire bisque and an unsupported lower-fire glaze, which creates its own problems.
    Bone China https://digitalfire.com/glossary/bone+china
    The process is completely different than what a potter would do: Bisque fire, glaze, high fire. Bone china is bisque fired to high fire and then glazed at a very low temperature. Since the porcelain has zero porosity, getting a glaze to stick and dry on it is not easy, the process needed goes well beyond what a normal potter would be willing to do.
    PS
    Balancing slumping and decoration has a long history. Robert Tichane expressed his surprise when he finally realised that the ancient Chinese cup he regularly drank from had a guilded rim to disguise the lack of glaze on the rim (a result of firing the cup rim-down to minimise slumping). 
    I'm having difficulty visualising your "handmade leather molds". I assume that they are semi-flexible press-moulds, but am unsure how you extract the bowl from the mould.
  24. Like
    Rae Reich got a reaction from Bernardita Cossio in Warped rims on my porcelain sculptures   
    A thicker rim will hold its shape better, if you can work that into the design/construction.
    Q: is it strictly necessary to have a perfectly round rim? The intriguing soft appearance of your sculpture does not, to me, require a perfectly circular rim.
  25. Like
    Rae Reich reacted to Min in Warped rims on my porcelain sculptures   
    The concave then convex side design might also be contributing to it being pulled out of round. 
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