Re: Wisner 4x5 Traditional

[Ken Sinclair <photo1@xxxxxxxxxxxxxxx>]

Don,
In many instances the fog you are obtaining are the result of IR "leakage"
through the felts when you remove the darkslide. I have on a few occasions,
taken to withdrawing the darkslide to clear the film and just pushing it
back in after exposure. I remove the holder and place a piece of masking
tape over the darkslide/holder  to provide for accidental re-exposure. If
you can be "quick" on the draw.. place either your hand or a spare
darkslide over the filmholder "end" to shield the felts.

Ken

>Wow, that's completely the opposite of my experiences I've had! I'm just
>baffled by the results I'm getting. I've gone through 1 box of HSI B&W and
>every negative has been scratched and fogged. I've solved the scratching
>problem by processing only one sheet at a time in a 5x7 tray, but each sheet
>has heavy fog on each end of the narrow side of the film and lesser fog on
>the 5 inch edges.
>
>I've used three different types of film holders, Lisco, Fidelity and Riteway
>with identical results. Regular film shows no sign of fogging so the light
>leak is IR. Therefore I suspect the bellows. I can use the IR bellows with
>regular film and get no fog. I guess my next step is to wrap the entire
>bellows assembly in aluminum foil and tape it to the front and rear
>standards. If that doesn't stop the fogging then I would think that the rear
>standard leaks light.
>
>Thanks for your help.
>
>Don Bryant

[||/\/\/\/\/\/\||      Ken Sinclair RBP, FBPA
[||                            ||-|   Applied Photographic Services
[||                            ||  |  Lethbridge,
[||                            ||  |  Alberta, Canada,
[||                            ||-|   (403) 381-1654.
[||\/\/\/\/\/\/||      photo1@xxxxxxxxxxxxxxx
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