Silica gel

Joined Feb 2006
237 Posts | 0+
Norman, OK
OK- here's some data on something that doesn't work for humidification...

My wife used those little crystals that swell up abot 1000% into a rubbery gel when you add water as decorative vase fillers at our wedding reception. My mom uses them to mix with potting soil to improve its water holding capacity. You can't use them as hydration media for your humidor.

Yesterday I had the brilliant insight that maybe they were the media in the gel pack humidifiers. I ran two experiments. In one, I added just distilled water to the crystals and placed in a tupperware with a digital hygrometer. In the other, I used 50/50 propylene glycol solution. The one with pure water climbed all the way to "HI" humidity. That hygro reads up to at least 92%; I'm not sure exactly where "HI" kicks in. The one with PG solution stabilized at about 92%.

Both of these are clearly too high for your humi. Now, I suppose it is possible that with further chemical tweaking, you could achieve success, unfortunately, I don't have any pure PG to play with. I'm thinking that maybe this is the stuff they use in water pillows, etc, but that there is a specific chemical additive mixture that they use.

Just doing my part in the furthering of penny-pinching humi control! I think I'm going to try the cat litter bit next. It makes sense that a cat litter has hygroscopic properties. However, I have hard time believing that a product that is not engineered to maintain a particular RH will do so as well as the heartfelt beads, but at the price per pound of cat litter, it's worth a look-see.
 
You should be able to get pure GP at any pharmacy. That is where I got mine.

I am using the cat litter in drilled out cigar tubes in 3 humidors. Rock solid at 60% by my correctly calibrated analog hygronometers. I do not fill the tubes, and try to keep about half the crystals wet, and half dry. So far it is looking good!

There you go, just my 1.35 cents worth.
 
Not trying to hijack, just one question for Bikeman
How is the burn on your cigar at 60%? Is it consistant even burn?
 
Do you mean polymer crystals? Some people use those in their Cigar Oasis'. However the Oasis controls the RH in that case. Some people use them just in dishes like you would beads but I don't know much about that.
 
Thats a really good idea to drill out a few cigar tubes for the crystals. I was trying to think of a good container for them i just might do that.

Thanks