Safe Storage Of Old Coins

I agree with the Mylar 2x2 suggestion (I was never a fan but since I started collecting ancients where there is lots of information to write on them I like these a lot)

IF you buy a binder and pages to hold the flips be sure to get pages which dont contain PVC since they will effect the coins even through the mylar flips.

It is not always easy to know whether the plastic contains PVC... some earlier binders that I had the pages were assured to me as PVC free but with 15 years sitting inside I got definate PVC slime. I since dipped all my coins in acetone (and dont think it will do any harm or that anyone will be able to tell if you dip coins in acetone before storage) and moved over to a different brand of page. Some of the coins lost their luster because of the slime but no major damage done really to the majority.

I dont know how you can tell 100% whether a plastic has any PVC in it untill the damage is done, but I would say that the safe pages tend to have no smell at all to them, the unsafe ones I had smelt plasticy.

Mylar 2x2's in non PVC archival quality album pages is the way to go.

Slabs and air tights are fine, but they present a different range of storage problems, but slab albums can be bought. My collection does not lend itself to this approach.

With the clear Mylar 2x2's, you get to document all of the information relating to the coin, AND get to see it at the same time, WITHOUT direct contact of your fingers on the coin. The natural oils on your fingers can permanently stain coins.
There has been some woe reported in the CCF regarding permanent fingerprint stains on coins.

Don't use soft clear PVC album pages.