it left just the very teeeeeensiest hint of pink on the mylar window (such a small hint that it could be my imagination), but you can see what it did to the 12 pocket page

That is the only chip that I've seen bleed that badly...but a few of our red chipcos have tinted a few 12 pocket pages pink, too.

That said, we still use the cardboard holders and 12 pocket pages.