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Old Jan 21, 2010, 12:08 AM   #1
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Default silica packs

I've been saving a few of these. I got a couple of larger ones when i bought a bandsaw

Good thing too, because now I am told to watch for fungus growth on my equipment in Costa Rica.

So my question..does anyone know just how much moisture they can absorb before they need to be dried out?

And how big would they need to be to keep a camera dry?

The ones I got didn't come with instructions, except for the stamp all over it that say 'Do Not Eat'...
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Old Jan 21, 2010, 12:22 AM   #2
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I keep one 1/2 pack in each of my lens bags. Seems to do the job. Since you have only 2 lens, keep one or two of the big ones you have saved in you bag, and you should be fine. They do a very good job of sucking the humidity and moisture in a closed bag. And change them out when you get back to the hotel with the ones you left out to dry out.
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Old Jan 21, 2010, 1:07 AM   #3
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I dry them in the oven...will they dry enough in the hotel over night? I guess there always the hair dryer to do that..
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Old Jan 21, 2010, 2:49 AM   #4
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First, I think that it's not necessary to take silica gel packets with you on your outings. Your lenses will be exposed to high humidity whatever you do, and taking the packets with you will simply saturate them sooner. I think you should leave the packets in your hotel room, and place them back in your camera bag when you return.

Second, the recommended way to regenerate silica gel is to heat it to 250F for two hours. I don't think a hair dryer is going to do it. And if you don't take the packets with you on your outings, they'll last longer, so you probably won't need to regenerate them for the duration of your vacation.
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Old Jan 21, 2010, 4:17 PM   #5
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Thank Tcva... go to know this stuff...

BTW you mentioned silica gel ? is that different then the little beads???
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Old Jan 21, 2010, 5:26 PM   #6
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Anyone know where you can buy some of these packets as I don;t have any of them and want to get one for my camera bag

dave
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Old Jan 21, 2010, 5:33 PM   #7
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amazon adorama carries them,
http://www.amazon.com/Olympus-GEL-SI...1&sr=8-1-spell

http://www.adorama.com/ZZSG4.html?se...=scilica+packs

but any good camera shop should carry them.
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Old Jan 21, 2010, 6:47 PM   #8
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Quote:
Originally Posted by littlejohn View Post
BTW you mentioned silica gel ? is that different then the little beads???
From the Wikipedia article on Silica Gel:

Silica gel is a granular, vitreous, highly porous form of silica made synthetically from sodium silicate. Despite its name, silica gel is a solid.

When it is manufactured, it is a gel. As it is processed, it hardens.
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Last edited by TCav; Jan 21, 2010 at 6:52 PM.
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Old Jan 22, 2010, 12:23 AM   #9
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WOW...They say if you've learned something new..the day isn't wasted....I can go to bed now...

Thanks


I just looked at the link Tcav posted...here's a nice tidbit..


Cat litter

Silica gel is also used as cat litter[4], by itself or in combination with more traditional materials, such as clays including bentonite. It is trackless and virtually odorless, albeit expensive. Silica in this form can be a cost effective way for private people to easily purchase silica gel for application in such things as keeping tools rust free in damp environments, long term storage, and preservation of dried food for long term storage.

Last edited by littlejohn; Jan 22, 2010 at 12:30 AM. Reason: kitty litter...
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Old Jan 22, 2010, 7:19 AM   #10
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I presume you'd use new kitty litter to preserve dried food, and not ... you know ... used kitty litter.
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