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[Beth_nagle]

Greetings, I searched the archives but couldn't find anything that addressed how to test your light seals.  I just replaced them on a FTB QL.  Thanks in advance for any help.
 
Beth Nagle
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[M_currie]

That's a good question. My best guess would be to go out and get a roll of the fastest cheap print film you can find and take pictures in bright sunlight. Maybe aim a powererful flashlight at all the seams for a few shots. Turn the camera every which wa

[Beth_nagle]

Thanks, well, I was hoping there was a way to do it without using film.

[Charlie]

They get very mushy. If you see small black specks near the seals or if you can dig them out easily using a toothpick they need replacement.

[Glenn]

If you have used the proper materials ie one of Jon Goodman's kits, cut to the correct size and placed in proper position, you will have no need to test.
 
However if you really insist on testing. On loading your next film wind to frame one and

[Rick_oleson]

There is no way to do it without film.  You can test without film for light leaks almost anywhere else, by opening the back and inspecting with a flash or a bright flashlight in a dark room.... but back seals can't be inspected with the back open, a

[Krp]

You would not need prints for the test.  The negs will do,  'process only' for the roll.

[Charlie]

Even if it's not leaking yet pieces of a disintegrating seal can gum up some of the mechanisms in the camera. If in doubt ---

[M_currie]

Even if it's not leaking yet pieces of a disintegrating seal can gum up some of the mechanisms in the camera. If in doubt ---
 
Good point in general, but Beth is testing a new set of seals.

[Beth_nagle]

Thanks all for your comments.  
 
Glenn, I did end up getting a better kit via Mr. Goodman and he has been very helpful. I will get the kit soon and follow his excellent instructions and will just load up with film and fire away.  
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[Paul Ron]

There is a way to test em. Put a bright light inside the camera and take it into a dark room. If you see any light leaking out, the seals are shot.