I think we have unraveled the problem differences in the use of
Kaboom cleaners to patina silver.
The sample pictures that Lee sent me are very interesting . The
parts are black to the eye but the camera sees things differently.
There are apparently two Kabboom products that appear to be similar
but are really very different chemically. The original post
specified "Kaboom shower, tub and tile cleaner" and this is what
I found at the market. The MSDS gave no indication that it would
work but it apparently did...Simple trials were negative as would
be expected but Lee got a partina. ???
I played through the stuff sold with a Kaboom trade name and found
this one for "Kaboom all surface stain remover":
This should blacken silver!!!! It contains:
Sodium metabisulfite about 3-4 %
and Disodium sulfite at 1-2 %
This NIH data base doesn't seem to show the bath and shower
The blackening tarnish of silver and copper is a reaction with
sulfur and sulfur compounds it is not a reaction with oxygen.
Kaboom seems to be just a marketing outfit that doesn't make
anything. I tried to get them to furnish MSDS's ( required by
law) but can't get a reply. Maybe they are selling two different
substances with the same label. ???
Checking cleaner labels at the store shows that many do not
disclose contents at all.. I'll try to find some "Kaboom All surface
stain remover" but > It shouldn't be hard to mix up a batch..