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Full frame neg carriers for 4x5?

Yep, done by the book, AN on top, regular on bottom...
I was wondering if the AN glass is treated on both sides. Also, some films might require AN glass on top and bottom.
 

Technically 'flashing' would not produce any density on the un-exposed portion of the image. Technicalities aside, could you hold a piece of cardboard in one hand and the flashlight in the other. Shield the border as you are using the flashlight.
 
Technically 'flashing' would not produce any density on the un-exposed portion of the image. Technicalities aside, could you hold a piece of cardboard in one hand and the flashlight in the other. Shield the border as you are using the flashlight.

There's two uses of the same word... 'flashing a-la Lootens' is what I call the dramatic, "hit the corners with a pen light" kind of flashing. Compared to threshold 'flashing' which you are right, does not produce any density without added light. I wouldn't have problem with that kind of flashing.