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==heated with concentrated hydrochloric acid==
I've been trying to make Zinc Sulphide:Manganese doped electroluminescent paints for electronics displays. I'm getting the manganese from old batteries. Getting it cleanly away from the activated carbon and in a usable form with the most basic of chemicals and methods (so others can have a go at home) has required a bit of thinking
But I ended up simply mixing the black paste (after three water washes to remove the base) with 28% hydrochloric. The mixture warmed it's self up and began to foam with all the carbon in there but, on vacuum filtering through a fine grade sinter, I now have my pretty pink, very clean salt.
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