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Keeps metals cleaner while refining gold, silver, and copper Use for seasoning your graphite crucibles Made in the USA

5 Lbs 80 Oz Anhydrous Borax Granular Graphite Crucible Powder Deoxidizing Casting Flux for Melting Assaying Refining Gold Silver Copper Separating

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Borax Flux

Keeps metal castings cleaner Works for soldering purposes too Made in the USA

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