Exactly what I'm wondering as well, and how I ended up watching this video. So far all I have heard of is some "scratch test" people do. I was hoping to find a video demo of it. No luck yet. I have dozens of scrapped pieces of museum glass I'm hoping to use and, if I have to, I guess I'll just dedicate a bunch of it for testing and do my own experiments.
It’s very simple. You take a razor blade and lightly scratch the very corner of the glass in a small spot that will be hidden by the frame. You’ll either feel a smooth glide indicating that that’s the front side of the glass, or you’ll hear a slight scratching sound and feel a bit of resistance, like you’re scratching very fine sandpaper, and that would be the underside that faces the artwork.
@@marymonk that’s very strange. I’ve never seen or heard of that. Every glass with uv has a coating on one side that faces the artwork. And when you scratch it with a blade, you can hear and feel it. It’s very thin, but it feels kind of like a thin crusty layer when you run a blade on it. The only “glass” that has uv inhibitors without a thin layer on the surface is acrylite which is baked into the plastic, and does not have a layer on the outside like traditional glass does.
Can I ask you how can I identify a museum glass withh 99% UV protection after the AR glass is installed in a photograph frame?
Very helpful. Thank you!
Of I have a pre-cut piece, how would I tell which side has the coating.
Exactly what I'm wondering as well, and how I ended up watching this video. So far all I have heard of is some "scratch test" people do. I was hoping to find a video demo of it. No luck yet. I have dozens of scrapped pieces of museum glass I'm hoping to use and, if I have to, I guess I'll just dedicate a bunch of it for testing and do my own experiments.
It’s very simple. You take a razor blade and lightly scratch the very corner of the glass in a small spot that will be hidden by the frame. You’ll either feel a smooth glide indicating that that’s the front side of the glass, or you’ll hear a slight scratching sound and feel a bit of resistance, like you’re scratching very fine sandpaper, and that would be the underside that faces the artwork.
@@marymonk that’s very strange. I’ve never seen or heard of that. Every glass with uv has a coating on one side that faces the artwork. And when you scratch it with a blade, you can hear and feel it. It’s very thin, but it feels kind of like a thin crusty layer when you run a blade on it. The only “glass” that has uv inhibitors without a thin layer on the surface is acrylite which is baked into the plastic, and does not have a layer on the outside like traditional glass does.
@@camilaramirezangelthis was super helpful, thanks!
@@silverstarfineart392 of course!