I like this technique for a few reasons, so I'd like to list a few pros and cons I've found:
Pros:
1) It protects the emulsion, but it also protects the front of the polymer from scratches and dust. It's very nice being able to store test holograms and take them out and touch them without worrying about ruining the actual film.
2) It's thin and lightweight. It's a lot easier to store than thicker glass because it takes not nearly as much room.
3) It's cheap, and doesn't need any special equipment. Since this can be done by hand and these glass protectors are readily found for <$1.00 each, I think maybe this would be good for beginners who want to keep smaller test holos safe.
4) No glass cutting required.
5) Because the glass comes individually packaged and with protecting film, each glass is perfectly clean from the start. (You don't need to clean the glass beforehand!)
6) The glass edges are rounded!
7) It's not permanent, so if the glass cracks it can be replaced with a similar piece. But even if it does crack, it won't shatter or break in half.
Cons:
1) The sizes are fixed, so unless you plan on cutting the glass, you'd have to match your holos to the glass size instead of the other way around. Most sizes are around 5" for android/iphone, but they also sell tablet size glass screen protectors too.
2) If the glass is larger than the holo, then gaps of air can form in the part where the two protectors are touching with no holo.
3) The glass is very thin, so it is not suitable for shooting unexposed film. I've tried this a few times, and I've gotten black splotches on the hologram.
- black.jpg (126.48 KiB) Viewed 4277 times
I like this technique for a few reasons, so I'd like to list a few pros and cons I've found:
Pros:
1) It protects the emulsion, but it also protects the front of the polymer from scratches and dust. It's very nice being able to store test holograms and take them out and touch them without worrying about ruining the actual film.
2) It's thin and lightweight. It's a lot easier to store than thicker glass because it takes not nearly as much room.
3) It's cheap, and doesn't need any special equipment. Since this can be done by hand and these glass protectors are readily found for <$1.00 each, I think maybe this would be good for beginners who want to keep smaller test holos safe.
4) No glass cutting required.
5) Because the glass comes individually packaged and with protecting film, each glass is perfectly clean from the start. (You don't need to clean the glass beforehand!)
6) The glass edges are rounded!
7) It's not permanent, so if the glass cracks it can be replaced with a similar piece. But even if it does crack, it won't shatter or break in half.
Cons:
1) The sizes are fixed, so unless you plan on cutting the glass, you'd have to match your holos to the glass size instead of the other way around. Most sizes are around 5" for android/iphone, but they also sell tablet size glass screen protectors too.
2) If the glass is larger than the holo, then gaps of air can form in the part where the two protectors are touching with no holo.
3) The glass is very thin, so it is not suitable for shooting unexposed film. I've tried this a few times, and I've gotten black splotches on the hologram.
[attachment=0]black.jpg[/attachment]