I make jewelry and I've managed to fill a copper loop with tainted glass. I hold the copper and glass in the hottest part of the flame of my little butane/propane torch. But when I try to do the same thing with silver wire, the silver melts before the glass does. I guess that is because silver isn't such a good conducter of heat. So I've tried to heat up the entire peace of silver (instead of just the little loop that I'm trying to melt the glass on) , which works a little better. But even if I do get the silver and the glass red hot at the same time without the silver melting together, I can't make the glass adhere to the silver like it did to the copper. Any tips?