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Right: My attempts to apply a layer of watery white underglaze to leather hard clay.
Left: After adding about a gram of Epsom Salts (and stirring thoroughly to dissolve) the slurry became thixotropic and gelled enough to enable applying a thicker layer with no problem. While this works on leather-hard ware, a high specific gravity slurry like this would not be ideal for application on bone-dry ware (unless significant time is allotted for drying between coats).
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