Are Inkjet prints safe in Pergamin sheets?

<p>I have been routinely storing my best inkjet prints (Epson pigments) in Panodia Pergamin ("cristal") sheets to protect them from chocs, since they are mostly printed on coton rag paper (Hahnemühle), which is supposed to be fragile. And the whole stock is stored in non-acidic cardboard boxes, which obviously is not fully consistent with a regular, acidic(?) paper like Pergamin. I am starting to worry, should I move to more expensive polypropylene, acetate sheets if I want my prints to be still in good shape in 10, 20,.. years?</p>