Hi folks, The best silver oxidizing agent on the market is a product
called Win-ox. It was developed by the master caster, Bob Winston. It
will instantaneously color silver black. Works on warm gold when
applied with a steel brush. address I have is Win-ox Po Box 3822 Walnut
Creek, Ca 94598 There is a product on the market called Cupronil that
prevents fire scale when soldering. It works very well. Clean and
polish your silver piece before soldering. Warm silver and spray on
Cupronil till it coats all surfaces. Once the silver is coated solder
as usual. Coat the silver each time before soldering. no fire coat!!!
fire scale!!! or that.
4 S labs
Po Box 11819
Phoenix, Az 85061