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Quote:

Originally Posted by Shaun @ Tru6 (Post 9911551)

Very valuable, great test, I've been doing the same thing with Cerakote in terms of UV stability. Black in a south facing window for over a year has done nothing to it.

What I want to know is what will either restore, slow down or arrest plastic degradation like on a 911 dash. I am restoring a 76 Carrera 3.0 with a crack free 1 year only dash. Amazon has 10 different automotive plastic conditioners.

Which one will actually work?

Quote:

Originally Posted by Tobra (Post 9985593)

If it is inside the window this is not a valid test

What Tobra said. If it's inside a window, you're not really testing anything, at least not with respect to UV resistance.

Watch this video, or at least starting at about 1:30. It's a video using a UV sensitive camera. (and it's an interesting video).

<iframe width="854" height="480" src="https://www.youtube.com/embed/o9BqrSAHbTc" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

That's interesting but it doesn't distinguish between UVA and UVB. My understanding is glass blocks UVB but not UVA. Most UV light reaching us is UVA. And magazines in the same window are faded, so there's that.

But I'll tape my test to the outside of the window for fun.

Quote:

Originally Posted by masraum (Post 9986156)

Watch this video, or at least starting at about 1:30. It's a video using a UV sensitive camera. (and it's an interesting video).

<iframe width="854" height="480" src="https://www.youtube.com/embed/o9BqrSAHbTc" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

Probably depends on the glass as well. If it's an old school single pane window with just plain glass, that won't offer much UV resistance. If it's a modern double pane glass filled window, it's going to block a lot.

Yeah, modern glass is designed to protect against UV. The glass in the building is definitely not modern. :)

Maybe drill a hole in it and hang it on a wire instead of tape. You want it to be there when you come back.

Magazine ink is probably not going to be very durable, WRT to photoresistance, even if most of the UV is blocked.

If you look closely at those old windows, they will be a little thinner at the top than they are on the bottom, due to the glass flowing a bit.