^5 clay 0 Report post Posted April 12 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 Share this post Link to post Share on other sites
Chilly 396 Report post Posted April 12 Don't glaze the bottoms, fire them flat on the shelf or on a cookie. Share this post Link to post Share on other sites
^5 clay 0 Report post Posted April 12 What's a cookie? Also I have to glaze the bottom, the gift shops I sell them to prefer that. Thanks Share this post Link to post Share on other sites
Chilly 396 Report post Posted April 12 A cookie is a piece of clay that protects the shelf from glaze runs. Share this post Link to post Share on other sites
Mark C. 2,194 Report post Posted April 12 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. Chris Campbell likes this Share this post Link to post Share on other sites
^5 clay 0 Report post Posted April 12 Thanks Mark, the stilts are the probem I guess, I will experiment with a foot Share this post Link to post Share on other sites
yappystudent 125 Report post Posted April 13 ^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. Rae Reich likes this Share this post Link to post Share on other sites
Rae Reich 115 Report post Posted April 14 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. Share this post Link to post Share on other sites