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https://help.glazy.org/downloads/pdf/031218-peter_berg-final_draft.pdf
They formulated glazes deliberately for durability, using a 0.3 R₂O : 0.7 RO flux ratio and controlled silica/alumina ratios, then tested 0, 1, 3 and 5% copper carbonate additions. Their test used 4% acetic acid for 24 hours and ICP-MS; the 5% copper-carbonate samples released copper in the tens to hundreds of mg/L range, with some cone 6 results far higher.
| Glossary |
R2O:RO Ratio
A ratio that compares the alkali fluxes (Na2O, K2O, Li2O) with alkaline earth fluxes (CaO, MgO, SrO, BaO). |
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