question for gurus about ... bw layer in colour film

[removed account4]

i have a fair amount of color film both e6 and c41 ... but i am going to be processing it all in b/w developer .. i have been doing this for a few years with great results ... my question is this ... if i expose the film filtered, and just process the bw layer, will the filtration be preserved or will it be lost?

thanks!

 

[Rick A]

Awesome question John. My initial thought would be yes, depending on which filter of course. RGB filters would have an effect on the silver layer, and may actually block (even if only partially)certain parts of the spectrum from imprinting in the silver layer even though you aren't developing the dye layers. That's just my take on it though, there are more knowledgeable around here that could tell you for sure.

 

[Athiril]

If you use a red filter you'll mostly expose the red-sensitive layer for example, though your filters and exposure wont match up 100% perfectly, of which of course will be darker on skies etc.

 

[removed account4]

rick and athiril :

thanks for your responses !

i am not sure if i will get to this today ( maybe i will, maybe not )
if i do, i will post my results to this thread ...
i am SO looking forward to using up my stocks of color films
and 3 negatives/views for each exposure is as good a way as any

 

[Rudeofus]

You do realize that you will still only get a b&w image, yes? I don't think there will be a visible difference between filtered and unfiltered negative ...

PS: this should also put your "I can fit three independent image frames into one film frame" idea to rest.

 

[Prof_Pixel]

You can think of the three B&W layers (R, G & B sensitive) that are the light sensitive portion of a color film as making up a panchromatic film, so using a color filter and then developing as a B&W film should produce approximately the same result as using the filter on an actual panchromatic B&W film.

 

[removed account4]

You do realize that you will still only get a b&w image, yes? I don't think there will be a visible difference between filtered and unfiltered negative ...

PS: this should also put your "I can fit three independent image frames into one film frame" idea to rest.

hi rudeofus

yup, i realize if i process the color film in b/w chemistry i will get b/w images.
both chrome film and c41 film i have processed in b/w chemistry for a few years
and gotten results i was happy with. i wasn't planning on making 3 independent exposures on 1 frame
this time ... maybe another time ( with a polaroid camera ) i 'm making
something like a technicolor image, the old fashioned way... ( tri chromes )
the portrait camera ( polaroid 500 ) i have takes standard 4x5 sheet film holders
so if i want to put my exposures on 1 frame, it divides it up into 6 frames

You can think of the three B&W layers (R, G & B sensitive) that are the light sensitive portion of a color film as making up a panchromatic film, so using a color filter and then developing as a B&W film should produce approximately the same result as using the filter on an actual panchromatic B&W film.

thanks for the re-assurance prof_pixel, now i am really looking forward to making a few test exposures and seeing how it goes.

- john