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51:7 ·
A sign for borax or tinkal, a substance used, among other things, for enamelling and in the manufacturing of glass and porcelain. It was used in alchemy and early chemistry. |
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51:7 ·
A sign for borax or tinkal, a substance used, among other things, for enamelling and in the manufacturing of glass and porcelain. It was used in alchemy and early chemistry. |
