Since humidity can cause so many problems with 
cels, I decided to fight the problem at the 
source. If I cant seal up the cels from the 
humidity, why not just eliminate the humidity 
from the surrounding atmosphere? The picture you 
see here is my current cel protection setup, with 
the cels in polypropelene sheet protectors, which 
are inside a Pratt archival art book, which I 
keep inside an art portfolio case, (Its under the 
cel book), which hangs inside a dark closet. 
Anyways, my super solution is that strange white 
bag you see on the left. It is a massive silica 
packet, aka: dessicant pouch. Its quite big, 
(about 1 pound!) and is used for keeping the 
inside of fireplaces dry during shipping when 
new. 

Since my cel case tends to confine the cel book 
from the outside atmosphere pretty well, Im 
asuming that putting this big silica pouch inside 
my cel case will reduce the humidity levels quite 
a bit. However, has anyone else ever tried this 
before? Im not sure if the silica pack will harm 
the cels. Since these packs are typically used in 
many products today, (Incuding food) I assume 
that it will be ok. Any thoughts?

Thanks!
-Mike