Mingo
Active member
Hello all;
I have just precipitated 4 oz of silver ?chloride? using the method Noxx outlined for photo-grade silver. I started with Sterling from some old Sterling flatware and various necklaces (the hallmarks were in place and stannous tests affirmed same) I followed the procedure closely, washed with hot water 5 times to rid as much lead as was possible, also added 10 ml H2SO4. I treated with industrial strength ammonium hydroxide to digest, added HcL to break the bond, filtered, washed as was required and then treated with KoH to proceed to the oxide.
I now have a nice uniform light gray powder. When I ran a test melt, all I get is a reddish slag. I tried this several times and decided to start over. I added the 50-50 mixture of 70% nitric and water and absolutely nothing will react with this powder. Why? I am now using the copper cementation method with good success, but I need to save these 4+oz''s.
Any help is always appreciated. This is my first real run with silver.
Regards, Tim
I have just precipitated 4 oz of silver ?chloride? using the method Noxx outlined for photo-grade silver. I started with Sterling from some old Sterling flatware and various necklaces (the hallmarks were in place and stannous tests affirmed same) I followed the procedure closely, washed with hot water 5 times to rid as much lead as was possible, also added 10 ml H2SO4. I treated with industrial strength ammonium hydroxide to digest, added HcL to break the bond, filtered, washed as was required and then treated with KoH to proceed to the oxide.
I now have a nice uniform light gray powder. When I ran a test melt, all I get is a reddish slag. I tried this several times and decided to start over. I added the 50-50 mixture of 70% nitric and water and absolutely nothing will react with this powder. Why? I am now using the copper cementation method with good success, but I need to save these 4+oz''s.
Any help is always appreciated. This is my first real run with silver.
Regards, Tim