Hello dear Orchidians, hopefully all of you are healthy and stay safe during these times.
I am experiencing an interesting problem these days. I used a copper sheet as a base plate and after finishing everything needed on it, proceeded with soldering five silver prongs on it. I chose fine silver for that. However, after pickling and polishing, when I go on to set the stone and I adjust those prongs cracks become visible at the points of inflection.
I have no idea why this happens, I took care not to put the flame on the wire and not to overheat it. To solder I’m using medium solder. Because this is fine silver I also expect it to be less brittle prone than sterling.
What do you think I do wrong?