Archived posting to the Leica Users Group, 2001/09/20

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] Bubbling under black chrome on M6
From: "Don Dory" <dorysrus@mindspring.com>
Date: Thu, 20 Sep 2001 21:55:59 -0400
References: <F269fMVur6nzO9OMHff00000ed2@hotmail.com>

The black chrome is an anodization process where the base metal is oxidized
with other elements.  So, unlike chrome or silver which is deposited over
another metal and is subject to pitting or peeling, anodisation is very
similar to selenium toning of our silver prints to increase their longevity.
If it is bubbling then there is probably some impurity in the underlying
metal which is oxidizing with some other element.  So your suspicion that
the camera has been exposed to a corrosive atmosphere or situation is
probably correct.

Don Dory
dorysrus@mindspring.com

- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html

In reply to: Message from "Edward Mortimer" <munkfishy2k@hotmail.com> ([Leica] Bubbling under black chrome on M6)