What could cause this (hard panning)
I am using a glaze I’ve used for months now, have many variations of it that I have been using for well over a year and never had any suspension issues…until today the strangest thing happened.
i glaze about every two weeks so that’s about how long these sit if not longer. Anyway I pull out the glaze in question, mix totally fine do my glazing go eat lunch and come back and go back to same glaze and it’s hard as a rock all the span of maybe an hour. The glaze has very little clay and I add
What @PeterH said. Neph sye is a known bad boy in the glaze chem world. It is very high in sodium, which is why it is popular. It is also slightly soluble. Sodium is an alkaline deflocculant, which results in hard panning. The sodium slowly leaches out of the neph sye and at some indeterminate point deflocs the glaze slurry and it hard pans.
Also understand clay is the only material that can be flocculated to create a suspended glaze slurry. Materials such as feldspars or feldspathic materi
