I have a print that's adhered to what looks like cardboard (though white on the side with the print) and my great-grandfather signed on the cardboard. The print looks to me like it could be an albumen print - very thin tissue-like paper and I can see the fibers of the paper (pretty sure, anyway). I think it's only stuck down at the corners. I can try to get a good photo or two later, but it's behind glass and I'd like to get opinions before I even open it all up. I think it mostly looks ok, especially considering its likely age. I'd like to hang it somewhere in the house instead of sticking it in a dark closet. Our house is pretty lacking in light anyway, but I'm sure I can find a wall where it will never see sun and not much other light.

What, if anything, should I do to try and make sure it lasts as long as it can?
Should I try to find a framing conservator?
TIA!