posted 07-05-2005 08:45 AM            

Does carbon mesh absorbs hydrogen sulfides?

posted 07-08-2005 02:21 AM            

Tell me about the Carbon fiber mesh. Is it filiments of Carbon? Are they coated with something? Or better yet, give me the name brand and I will talk to the folks who manufacture it. I only have a BS in Chem, but I have friends with a little more education that I can call.

Happy to help..

posted 07-08-2005 06:57 AM            

The first time I saw this it was years ago at the NY Historical Society. Reading the label through the case I determined a product name (long since forgotten) and that it was made in the UK. For a while I tried to find these but no luck. Every once and a while when I think of it I go looking. This week I found that H S & C are selling a Jewelry box with a carbon liner also they have carbon blocks to place inside a case. Both are supposed to absorb hydrogen sulfides and prevent tarnishing.

quote:

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Tarnish Prevention Carbon Blocks

These inserts can be placed inside a cabinet, chest, or drawer, where a powerful carbon mesh absorbs hydrogen sulfides and other airborne agents, that tarnish sterling or silver plated items. Instead of having to remove tarnish with harsh chemicals and intense scrubbing, the patented fabric that fills these cubes attracts and holds these harmful contaminants, preventing tarnish from occurring in the first place. The set contains a vertical insert for cabinets and a horizontal one for drawers, each of which is guaranteed to absorb silver-tarnishing contaminants for 10 years. Using both inserts in a standard size china hutch will guarantee no tarnish for 10 years. Oak finish. Cabinet Insert: 4” H x 3 3/4”W x 3” D. Drawer Insert: 4 1/2” L x 3” W x 2 3/4” D. (12 oz.)

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This is all I know.

posted 07-08-2005 10:40 AM            

It is amazing what runs through ny mind at 2:30 AM... and not very clearly at all!.

Anyway, it is morning and I am awake.

Certain forms of carbon are much more reactive with oxidizers (sulfides for example) than silver is, so the carbon will react and combine with the sulfide (oxidizer) faster than the sterling silver will. In a closed or semi-closed drawer or cabinet with restricted circulation, both the carbon and the silver will react, but not only does the Carbon react faster, but this Carbon product is presented in such a way as to have a much greater surface area than the silver. It is probably very finely ground and suspended to maximize its surface area. the more exposed surface area, the more sites that are available for reactions with the oxidizer.

Basically, the Carbon product is a very large piece of flypaper with lots of sticky stuff on it, and the silver is a much smaller piece with much less sticky stuff on it.

Hope this helps.. Marc

posted 07-10-2005 04:35 PM            

Sorbents for Gaseous Pollutants in Showcases

posted 07-10-2005 07:10 PM            

Thanks.