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Go read Dan Schwoerer's paper on viscosity. I'm not apologizing for referring to Eutectics.
Keep in mind that in opals, crystals grow and they collapse and they grow again. Each time, a little less and it changes the viscosity as they change. They also change expansions understandably.
When Chuck and I were designing the glasses, we were targeting where things were the first time, not five times down the road. Down that path lies madness. . What you are doing is not something we were marketing towards. I would suggest that you set aside specific parts of that, and try making some pieces with more, and some with less sodium. See what happens. Follow the glass.
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Where are we going and why am I in this basket?
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