Music Sorb product

[Ron Nossaman]

>I rode from the hotel in Dallas to the Airport with the guy from that 
>company. He told me a bit about it on the way. Most any silica gel thingee 
>I have ever seen simply has an ability to absorb water from the air. Once 
>saturated with water, it then needs to be thermally desorbed. The 
>difference with this gizzmo is that it has a RH level at witch it will be 
>in equilibrium with the surrounding atmosphere (don't remember if this was 
>42% - but some piano-friendly RH), i.e. it will neither absorb nor desorb 
>water. If the RH in the surrounding atmosphere rises, the unit absorbs 
>water, and thus lowering atmospheric RH. When the RH drops below the 
>equilibrium RH, the unit will desorb the water and raise atmospheric RH.
>
>Now what happens when you have 80% RH in the room, an air exchange between 
>the piano interior and the room air - I suspect that at some point the bag 
>of stuff would get saturated - maybe you can just ring it out? Sounded 
>like it had some potential.


I don't know what the medium is, but I found something along these lines 
when I was looking for calibration methods for hygrometers.

http://www.natmus.dk/cons/tp/satslt/satsalt.htm

For what it's worth.

Ron N