cubbiephan wrote:this is the one i got a few months back. i talked to the guys at jerry's and they said it was all acid-free. i've been nothing but happy with it,
but are you sayin the pages are vinyl...and is vinyl not acid free?
http://www.jerrysartarama.com/art-suppl ... nline/5986
It ain't exactly clear .....
The description says that the paper is acid free and that the sleeves are polypropylene.
Polypropylene can be archival quality if specifically made that way. But, the description doesn't specifically state that the sleeves are archival.
If the sleeves smell like plastic - they're most likely not archival quality.
If the sleeves are colored/tinted in any way - they most likely aren't archival.
You can always ask them. Why don't you? Better to find out now instead of 20 years down the road with damage from acid.
It usually, but not always, takes decades for non-archival material to ruin a poster, especially when the poster stock itself is archival. If the poster stock is high-acid (non-archival) paper, than degradation can occur a lot faster.
But, nothing is certain ... I've seen pristine posters, 40 years old, stored in non-archival conditions the whole time. Then again, I've seen posters ruined by acid from the same time period. Ask a paper conservationist, I"m sure they can explain it all ....
To answer your other question - there are "plastics" in the vinyl "family" that are rough on paper. PVC for instance - which some manufacturers use for sleeves.
And, to throw a wrench into the works .... I've had 100% archival quality sleeves completely fook up signatures on posters - especially the gold and silver ones. I've never quite pinned down which "inks" and pens are at risks but I now keep the posters with these kinds of sigs in archival glassine.