For over 30 years, I have regularly used Tarn-X, and I recommend it
(carefully) to my customers for use on base metal, mainly brass. I
hand out to my customers a summary of advice, “Cleaning Multimetal
Jewelry.” Here’s what I say about Tarn-X:
"4. Dipping multimetal jewelry for a couple of seconds in a
commercial liquid silver cleaner called ‘Tarn-X’ is often the
simplest method. Follow the dipping with a thorough rinsing and
drying. Once dry, buff jewelry with the silver cleaning cloth, if
needed. For regular cleaning, keep a small amount of Tarn-X in a
container with a snug plastic lid; it may be re-used for months.
Pieces with an oxidized finish often will not need dipping; to do so
will gradually remove the patina.
“[Some cautions about using Tarn-X: (a) dipping jewelry will
probably remove any antiquing or oxidized coloring it has; (b) most
harder stones may be safely dipped, but the surface of coral and
lapis lazuli may be dulled by repeated contact with Tarn-X, and
sodalite may turn from blue to purple. Read the Tarn-X label. Do not
EVER ‘soak’ jewelry in Tarn-X.]”
When I chat with customers about buying a base metal ring (copper,
brass, nickel-silver), I say that the best way of keeping it clean
is to wear it through all daily activities, such as doing the
dishes, showering, washing one’s hair, scrubbing the floor, etc.
Then it will probably never need tarnish-removal. I love working in