Free Sample Pack of Mylar Sleeves

[steve B]

Originally Posted by Jobu

Hoes does mylar compare to polypropylene in terms of potential impacts on cards?

In the short term, there's not much difference, except that Mylar is a lot nicer. Much more clear, and a bit stiff.

In the long term, for archives and large collections where there might not be an opportunity to change a holder for decades or longer, there isn't really anything better than Mylar.

The only problems I've had with the few mylar sleeves I've used, some now about 30 years old, Are from the way I used them.
The seams were a bit inconsistent, some were a bit thick, so putting them into toploaders was a bit difficult.
And taking them out.... They're so smooth the air got wrung out from between the mylar sleeve and toploader, and from the mylar itself. I had to cut most of those cards out of the toploader. The sleeves were fine.