Thank you for your Orchid posting."I use a water torch which has the
tendancy to really blacken up white gold if I'm not carefull,"
I manage North American operations for a more sophisticated
(patented) multicell water welder unit, the Spirflame[tm].
Are you covering the crowns with a good high heat hard soldering
flux like Prip's or Cupronil which is especially good for white
If you are using a good flux and your water torch is still producing
heavy oxidation on your white gold jewelry, your water torch is no
longer producing a pure hydrogen / oxygen, completely balanced and
carbon free flame.
If your unit is a common single cell unit, it is time to not only
change your electrolyte but remove any traces of electrolyte residue
in the gas delivery part of your system, including the booster tank.
These units run hot and the gas which is produced is moist, carrying
with it electrolyte residues. In time, these need to be (regularly)
removed, since they can alter the flame temperatures, mixture of gas,
and cleanliness. It is why you will never see single cell units used
in high speed production or fully automated applications where the
flame composition and exact temperatures are so critical.
Even if the electrolyte is only a white powdery form, once the wet
gas runs through it again, it will pick up this material and can give
you problems. With a little time and care it can be corrected and
then this can be made part of your maintenance procedures. I would be
happy to work with you to restore your water welder's original flame
mix and configuration. You don't need to l ive with this.
Please feel free to contact me off-line for details regarding your
specific unit, and about how to remove those impurities.