How to identify the purity of the silver ingot
What method can I identify the purity of silver (silver ingots)? What method can only contain silver, aluminum, etc., how can you know the content of the lead aluminum?
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What method can I identify the purity of silver (silver ingots)? What method can only contain silver, aluminum, etc., how can you know the content of the lead aluminum?
Don't eat things, hope it can be simpler: -d ~