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Why does print face mounted to plexi look different than print mounted behind plexi??

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Post time: 2015-7-11 16:58:58 |Show all posts
I've been considering having prints done on plexi (print is face mounted to the back of plexi through a lamination process) and have been wondering why this is such a different look than a print simply mounted behind plexi.  In both cases the print is flush with the plexi.  Can anyone explain?  What am I missing?
db

Post time: 2015-7-11 22:51:50 |Show all posts
I've done both and don't see a large enough of a difference to continue paying the very high cost for face mounting. I now have an acrylic frame made out of one piece folded in half to make a frame and just slip the photo in between. Looks pretty good and is easy to change photos.

Post time: 2015-7-11 21:19:54 |Show all posts
GDB wrote:
Perhaps it is the print base but I think you are having some refraction when the print is behind the plexiglass. I don't care how close the print is to the plexi, or what medium is used to attach the print, you will get some refraction just because you have a different medium than air. Different glasses, different plastics all have a refractive index.
At least that is what I would suggest is the difference. Dang, every once in a while the college physics classes I took 36 years ago come in handy.
Cheers,
Gary
I think you are correct.  Many of the optically clear mounting films I have researched are specifically designed for face mounting prints to plexi suggestion they have matched the indicies of refraction.
db

Post time: 2015-7-11 20:07:51 |Show all posts
Perhaps it is the print base but I think you are having some refraction when the print is behind the plexiglass. I don't care how close the print is to the plexi, or what medium is used to attach the print, you will get some refraction just because you have a different medium than air. Different glasses, different plastics all have a refractive index.
At least that is what I would suggest is the difference.  Dang, every once in a while the college physics classes I took 36 years ago come in handy.
Cheers,
Gary

Post time: 2015-7-11 18:46:55 |Show all posts
Different print base. White paper base verses whatever - or nothing? I simply am guessing.
-- hide signature --Steve Bingham
www.dustylens.com
www.ghost-town-photography.com
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