NG vs Propane and silver

[Rose]

I just switched to NG from propane. I have a set of beads I've made many times using propane and now I can't get them to turn out using NG. At first I thought it was the torch I was using so I switched to my old one. They came out the same. I use silvered ivory stringer for flower stems on these beads and now the stems just turn an awful black. They used to look like SIS. I have several orders for these beads and I can't make them now. Does anyone have experience with this???

Thanks,
Rose

[Rose]

bump

[RSimmons]

This question seems to be kind of hanging in the air, so I'll toss out an idea. Have you looked at your flame chemistry? You might be running more of a reducing flame than you were before and getting a reaction out of the SIS that you aren't accustomed to. Try turning up the O2 (or turning down the fuel gas) and working a little slower. The oxidizing flame is a little cooler, but might keep you from blackening the SIS.

Robert

[Rose]

Well, Robert.... how did you know? LOL I am having some other issues as well with a new torch I got. It was more of a reduction flame than my minor. So I switched it out and went back to the minor and they came out the same. But you may be on to something here. I will play with the settings more and see how it goes.

Thanks,
Rose

[Kalera]

You do have to turn NG down more than you might expect to achieve an oxidising flame... try dialing your fuel down a bit more than you're used to, and see if that helps.