Quote Originally Posted by jtsatterlee
Type 55 is P/N sheet so with the 545 Holder/Back you can delay development.

Polaroid's wesbite does not list a 4x5 P/N pack.
There is a holder for the packfilm. I think it is #405. I'm sure it is listed on the Land List. I don't think it will work on a spring back being too thick, but it should work with a graflok back, though I've never tried it since I don't own one. You can't expose each sheet in the packfilm without processing though.

Maybe you can pull the sheet film (55) out of the 545 holder and bypass processing till later, but I'm not sure you can do it with the older type 400 holder. I've never tried opening the latch for cleaning the rolls and removing the sheet. I'll have to try it and see.

But, I have to wonder why bother? Just process and then put the neg in a plastic bag or tupperware with some water. I guess you won't have as much trash, but that doesn't weigh much. Though, if it works I guess there would be some advantage to not having a trash bag to carry around.