Biglou13 Posted December 4, 2014 Report Share Posted December 4, 2014 So I slurry mixed some clay approx 1 month ago. Today I was planning on drying clay today. Well trash can full has become a wetter! Like glaze thickness. When I first mixed it was at thick milkshake consistency....... Today it's wet As glaze. I've made plenty of clay this has me stumped? Link to comment Share on other sites More sharing options...
Guest JBaymore Posted December 4, 2014 Report Share Posted December 4, 2014 Maybe some soluble ingredients in the mixture causing slight defloc. Is there neph sy in there? Or a soda spar? best, ......................john Link to comment Share on other sites More sharing options...
Biglou13 Posted December 4, 2014 Author Report Share Posted December 4, 2014 Neph Sy yes. It's the galloway cushing clay body. C6 Clay Body - from Val Cushing: EPK Kaolin 35 Tile 6 Kaolin 15 Nepheline Syenite 23 Flint 22 XX Sagger Ball Clay 5 Bentonite 3 I've made this clay a few times.... Slurry, and in walker pug mill. Never had issues Link to comment Share on other sites More sharing options...
Biglou13 Posted December 4, 2014 Author Report Share Posted December 4, 2014 I've made body before with no issues. I did add a bit of de floculant. Don't most porcelain clay bodies tend to deflocculate anyway, as indicated by silt like sediment in splash pan... Link to comment Share on other sites More sharing options...
Guest JBaymore Posted December 5, 2014 Report Share Posted December 5, 2014 Clay bodies traditionally use potash feldspars for the sources of flux to develop some glassy phase. The reason for this is that soda feldspars and feldspathoids are slightly soluble in water. This can get soda ions into the water... and change the water chemistry so that the reactions with the charges on the surface of the clay platelet crystals change. This results in some strange behavior of the plastic body. The ph of the water used can affect this solubility greatly, as can any other ingredients that affect the water's ph. This is why a lot of cone 6 white clay bodies are so squirrely; often neph sy is used to get the flux content up there to lower the range. And they do NOT tend to age well (or reclaim well). best, ............................john Link to comment Share on other sites More sharing options...
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