Mailinglist Archives:
Infrared
Panorama
Photo-3D
Tech-3D
Sell-3D
MF3D

Notice
This mailinglist archive is frozen since May 2001, i.e. it will stay online but will not be updated.
<-- Date Index --> <-- Thread Index --> [Author Index]

P3D Re: Brass, again, for antique viewers

  • From: Duncan Waldron <J.Waldron@xxxxxxxxx>
  • Subject: P3D Re: Brass, again, for antique viewers
  • Date: Mon, 2 Feb 1998 16:48:41 +0000 (GMT)
On Mon, 2 Feb 1998, John W Roberts wrote:

> Could it be that the ammonia just facilitates the reaction, without being 
> consumed in the process? Anyone know the chemical formula for brass tarnish? 
> (If ammonia vapors can cause it, it wouldn't be a sulfur compound like silver
> tarnish.)

Why not? It would depend upon what was attacking the brass; use nitric
acid, and you would surely get a nitric compound; sulphuric acid (sorry,
but I'm British) would give sulphuric, and so on.

Maybe the formula is Br(2)Ta(lots)...

DW


------------------------------

End of PHOTO-3D Digest 2556
***************************