How do you alloy 925 silver from 999 or 9999? Got an in depth instruction?
Posted Sep 22, 2016, 12:46 AM UTC
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Heat and stir? Really, I believe it's that easy. The copper and silver are interchangeable on the crystal level.
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I did it a long time ago using .900 coin silver and a .999 round, but it took a little effort to figure out how much of which to use to arrive at .925 - and I can't for the life of me remember the ratio now.
I just melted them together with a little flux, stirring with a steel rod, and then centrifuged the molten silver into the lost wax mold.
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Add copper
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I thought it might be more complicated than just adding the copper. I guess it's easier than I thought.
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I agree with that first line totally. I have a bunch of silver scraps I was hoping to melt down and cast, I can see myself asking for advice before I potentially waste material as well. I guess I will think for a few minutes before I ask questions in this sub as a beginner
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Let's say you want 100 grams of .925
x(.999) = 100(.925)
- X represents how much .999 silver you need to create 100 grams of sterling.
.999X = 92.5
- x = 92.592592 (repeating)
You would need 92.6 grams (I always round up a tiny bit) of .999 silver to make 100 grams of sterling. Therefore, you would need 7.4 grams of copper as well as 100-92.6 = 7.4
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As others have said, it's as easy as getting the two metals and having them in the right percent (92.5% Ag and 7.5% Cu) by weight (assuming both pure/fine). So, if you have 200g of fine silver and you want 200g of sterling, then you need to cut off 15g and then take the remaining 185g and melt it together with 15g of copper.