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Re: Silver-plated keys discoloration!?

Author: L. Omar Henderson
Date: 2005-11-14 03:04

(Disclaimer- I sell a silver tarnish inhibitor sachet)
The activated charcoal sold in tropical fish supply stores - to my investigations - only comes in the granular form. It is coconut shell waste that they heat to high temperature without air and forms charcoal. This form of charcoal is called "activated" because it is has a very porous structure and the carbon binds many chemicals very tightly thus removing them from potentially reacting with your silver keys. This carbon binds a number of different chemicals from the air - sulphur being one of them - but it has a finite mass binding quotient based on the amount of carbon present. A high thread count little bag e.g. 300-400 count cotton will not allow the carbon dust to get out (no one will miss a little square snipped from the corner of your bed linens) !!! An alternative is porous mylar.

Newer solid phase chemical air purification materials are made to have differential affinities for different classes of chemicals so that they are more efficient at removing them but also are not "poisoned" by other more prevalent chemicals in the environment. Various mixtures of these materials are used for specific removal of certain types of air pollutants. Most of this technology is proprietary to several manufacturers but can be purchased in bulk relatively cheaply.
L. Omar Henderson

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