Fellow Ganoskin members,
I hope this finds you all well. Have a question I was hoping may be able to help with. We have a manufacturer proposing to use a layer of potassium argentocyanide as a base layer below .3 microns of palladium iron and top layer of 2.5 microns of Au for vermeil jewelry. Can anyone advise on the safety of potassium argentcyanide and also why it would be used as opposed to a 5 micron layer of Ag? Thank you for your help.
-John