Coat rings and jewelry fittings with acid solution or wax.
What does a Boiler-Out do?
Coats rings and jewelry fittings with acid solution or wax to protect metal from oxidation during soldering process: Drops fittings into boiling acid solution for specified time, or applies wax to fittings, using brush. Removes acid coated fittings and heats them in oven to harden coating. Dips soldered articles in chemical solutions and water to remove coating.