Archival Quality Sheet Protectors: Trustworthy Or Not?

When putting the stamps/paper with cancellation on cardstock with photomounts, whats the final mounting finish? I recently purchased some acid-free archival quality plastic sheet sleeves for some college papers and was wondering if I can use those to insert the cardstock into. On another thread there was a warning that plastic sleeves can cause problems, especially reacting with the cancellation stamp and moreso if there's pressure from other pages. Does that come into effect if the sleeves are clearly marked for archival/acid free?

-note: I moved this over from another topic of mine for clarity in conversation-

There is a company called Vue all out of Florida who make very safe pages. I've used them for nearly 40 years without issue. You could get them from a company called B&H Camera.
Tom

I read that if it is archival which is acid free it is not suppose to cause problems with ink.

I have used some reg'lr ol Avery sheet protectors for over 20 years (not necessarily for stamp collecting) without any hint of problems. I believe that they are sold as "acid free" but I could be mistaken about that.

Well I bought a pack for my college coursework and have a bunch left over. They're labeled as acid free, archival quality. They're a stop gap for me right now as I plan on the best layout for my WW2 series. Im not worried so much about value degradation as I am about appearance. I'd love for these things to be protected for generations to come so future collectors may enjoy them, maybe even benefit form some historical info I plan of adding to the mix. Also I'm considering printing a big army boot coming down on top of one of my hitler stamps at the very back, to kinda close out the album visually on a high note.

To give you an idea of what I've done, I've placed some on-paper stamps with cancellation marks on a sheet of high quality cardstock (acid free) with corner photo mounts (archival quality acid free as well). Then I added 2 more cardstocks to the stack behind it and inserted it into the sleeve, purpose being to provide a center cardstock for added rigidity and the 3rd sheet to add more pieces to as my collection grows. Seems sturdy and not as flexible now that I've added the extra pieces.

Archival and acid free quality protector sheets are fairly safe.
I use Avery and and other companies. Larger size you can get from
Michael Store too.

tikithindi

Cool, thanks. I'll just maintain a watch on them for any issues. So far I'm on week 2 and no distortions or discoloration.

Avery makes both non-archival and archival types of sleeves- be sure to purhaase correct type. Also, I use BCW sleeves for all my postal stationery cards as well as modern panes - a lot less expensive than showguard/scott mounts. I use an archival double sided tape to mount them in my Scott albums. Look great.

I think I have seen 2 kinds of sheets available. The ones that are polypropylene I think are the best for clarity. I think the other is the polyethylene type. There is a lot of them that when you go to buy only says that they are archival and acid free.

I kind of use archival sheets right now to make my own stamp mounts. I use one of those heat sealer machines with some black acid free card stock as a backing. Don't know too much about the color fastness of the card stock but for now they look ok. May have to rethink my process if I can find some thin plastic archival sheeting that is black in color. But for now it is working ok just a little time intensive to do neatly.