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On Sun, Jun 03, 2007 at 10:16:02AM +1200, Steve Baldwin wrote:
> On 2 Jun 2007 at 6:29, Peter P. wrote:
> > What happens if one puts (submerges) such a packet in a cup of H2O ?
> > The total volume should not decrease but upon removing the package a
> > sizable amount of water should be 'missing' from the cup, no ? Also,
> > is this not overloading the desiccant ? Can it be regenerated after
> > such an extreme use ?
> 
> You can recycle Silica Gel. It's blue when it's hydrated and pink when it's 
> dried out.

This isn't strictly true... Manufacturers add marker pellets containing
a cobalt indicator. It's the indicator chemical that changes color;
silica gel itself is colorless regardless of how much water it has
absorbed. Often this cobalt indicator is left out as the cobalt is not
food safe.

- -- 
http://petertodd.ca
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