Graded slabs and UV issues?

[raulus]

Most of my graded items are in storage containers, with no access to the light, unless I take them out to play with them a bit. I’m usually pretty OC about putting them back when I’m done, so there’s little risk of leaving them out for potential exposure.

I do have some large pennzoni display cases on the wall in one room. I actually put a layer of UV protective film on the plastic, just to avoid the possibility of sun sneaking through the windows and fading them over a few decades.

For a handful of large graded items that I have leaned on top of the display cases, I actually put a layer of the UV film right on top of the graded case. I figure I can always pull it off pretty easily. If absolutely necessary, since there are only a handful that I treated right on the slab, I could always get them re-holdered without having to spend a king’s ransom.

[steve B]

It would depend on which plastic the slab is made of.

Polycarbonate- Lexan blocks most UV.

Acrylic- I think does not really block much unless it's specifically manufactured to do that.

https://www.palram.com/blog/construc...ted%20through.

https://www.acplasticsinc.com/inform...v-transmitting

I'd think that if the slabs were made from a UV blocking plastic the grading companies would advertise that.
But then, I think they ought to do lots of things they don't do.

[GasHouseGang]

Anyone have faded cards in holders that weren't faded when they went into the holders? That should clear it up.