^5 clay Posted April 12, 2018 Report Share Posted April 12, 2018 Hi All I make flat bottom square platters and I glaze the bottom and fire them on stilt. The platters are flat after the bisque firing but warp in the glaze firing and end up rocking. Does anyone have a similar challenge? Any suggestions? Thanks Link to comment Share on other sites More sharing options...
Chilly Posted April 12, 2018 Report Share Posted April 12, 2018 Don't glaze the bottoms, fire them flat on the shelf or on a cookie. Link to comment Share on other sites More sharing options...
^5 clay Posted April 12, 2018 Author Report Share Posted April 12, 2018 What's a cookie? Also I have to glaze the bottom, the gift shops I sell them to prefer that. Thanks Link to comment Share on other sites More sharing options...
Chilly Posted April 12, 2018 Report Share Posted April 12, 2018 A cookie is a piece of clay that protects the shelf from glaze runs. Link to comment Share on other sites More sharing options...
Mark C. Posted April 12, 2018 Report Share Posted April 12, 2018 The stilt was you call it is your problem. If you want the bottom glazes add a foot (which is unglazed ) then you can fire the bottom glazed and they will stay flat.The foot does not have glaze . This is the way they should be made really -the glazed bottoms with stilts is a low fire cone 08 thing-not a cone 5-6 thing. Thats why the warping is occurring . Also a photo would help us diagnosing your issue. Link to comment Share on other sites More sharing options...
^5 clay Posted April 12, 2018 Author Report Share Posted April 12, 2018 Thanks Mark, the stilts are the probem I guess, I will experiment with a foot Link to comment Share on other sites More sharing options...
yappystudent Posted April 13, 2018 Report Share Posted April 13, 2018 ^5, you might get some clues from previous forum posts about keeping plates flat. It's a bit of a challenge but there are definitely some things that will help, like making sure to compress the clay hard (I put a board on top and stand on it sometimes) and rolling it out in all directions: think British Flag pattern, which will help keep it from warping. Link to comment Share on other sites More sharing options...
Rae Reich Posted April 14, 2018 Report Share Posted April 14, 2018 22 hours ago, yappystudent said: ^5, you might get some clues from previous forum posts about keeping plates flat. It's a bit of a challenge but there are definitely some things that will help, like making sure to compress the clay hard (I put a board on top and stand on it sometimes) and rolling it out in all directions: think British Flag pattern, which will help keep it from warping. And never let it bend during construction - clay remembers those bendings during the firing. Link to comment Share on other sites More sharing options...
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