Aloha, Acetylene gas contains carbon components.Which are very
contaminating in some applications,in particular,Platinum work
and casting(don’t do it,avoid at any cost) and in soldering
gold.Difficulties can be avoided or eliminated by using another
choice of gas(propane,natural,or hydrogen).Some people have no
choice but,If you can,it is better.Hope this answers some peoples
question.If you have more,ask away.
Jewelry By Design