Cels Forum

Hi

After no luck searching the commercial cel sites for cel 
baggies, I decided to do a "general" search and came up 
with several sites that deal with archival magazine, comics,
and other supplies. Bags are bags, doesn't matter where I
get them - however, there are three types - polypropylene,
polyethylene, and mylar D bags. 

Anyone know the difference and quality? Mylar D is, according
to these sites, the best for museum-quality archiving, but
in some descriptions there's the term "pure white" - there 
are no pictures, usually, so I can't tell if that means it's
opaque.  Comments would be appreciated - just remove the 
obvious from my e-mail and shift things right one.

Thanks!
-Thia