There are three possiblities for that mark. One is that polishing
compound, like rouge, etc, is still on the silver after you’re done, and
this is black, and will leave a mark. Solution: Clean it better after
Second is that you’ve got something on the clothes, or being added to the
silver during wear, which acts like a polishing compound. If the mark were
on skin, this might be the most likely bet, since many cosmetics contain
things like cerium oxide, or other pigments, which can act like rouge, and
will cause silver or gold to abrade off onto the skin, leaving the same
black mark it does on a buff when you polish it intentionally. But on
your clothes, this is less likely, unless you’re using your cosmetics in a
manner where some gets on the clothes too. some face or talcum powders,
for example, might for a dust which settles on the fabric when you apply
it, and then the silver can abrade itself on that powder. I suppose it
might even be possible for some laundry products to leave a similar deposit
on the cloth, but I’m not aware of anything of that nature.
The third possibility is that if the silver has been antiqued, and then
not cleaned, the black sulphide formed in the antiqueing process is not
always very adherent, if too much is applied. This can leave a stain.
Solution is to not leave antiquing solutions on the silver quite so long,
and perhaps also to use a light brush (like a brass plater’s brush, used
with soapy water) to lightly burnish the antiqueing down onto the silver
afterwards, which removes any dusty non adherent black sulphide. This does
not apply to those paint on laquor based antiquings, only to the chemical
the bottom line to keep in mind is that clean silver, rubbed on clean cloth,
does not leave a mark. Some dirt, polish compound, or abrasive or other such
contaminant must be present to cause that problem.
Your rouge clothes themselves will leave a rouge or other polish compound
residue. Wash the silver item carefully after any polishing operation, to
be sure no polish compound remains.
Hope this helps.