Turning a colour reversal film (e-6) into a b&w reversal

[jpolzfuss]

Hi,

there are several sources that claim that processing a e-6 colour reversal film as a b&w-film will result in a b&w reversal film, e.g.:
http://www.ingroup.de/fotspiel.html
But others claim that this will result in a b&w negative film.
Other rumors say that leaving out the "Colour Developer"-step in the e-6 process will turn the result into a b&w reversal film... .

So is this all a rumour or can this be done somehow?

Jörg

[christoph]

did some short test with a slide film recently...

a color slide film in b/w negative chemical gave a b/w negative image as expected, so i strongly suspect processing it in a b/w reversal process would result in a b/w reversal image.

note however that i got a really brown murky base fog on the b/w negative, i guess there's some anti-haliation dye that only gets disolved in the reversal process, and from the look of it i'm not sure if the b/w bleach would take care of that too.

++ christoph ++

[mattias]

note however that i got a really brown murky base fog on the b/w negative, i guess there's some anti-haliation dye

or just... dye? it's a color film after all. as for leaving out the color developer, that step replaces undeveloped silver with the coupled dye, right? so it would result in absolutely nothing after bleaching out the silver. if you skip the bleach too that should give you a black and white negative. in fact isn't e6 without bleach and color developer exactly the same as the black and white negative process? ;-)

i'm only guessing here, based on what i know that the chemicals do. i've hardly even tried e6 processing myself.

/matt

[christoph]

note however that i got a really brown murky base fog on the b/w negative, i guess there's some anti-haliation dye

or just... dye? it's a color film after all.

yeah, could well be. i havent thought of that..
so all we need is a dye bleach that leaves the silver intact ;)
++ christoph ++

on a second thought, the image dye should only form in the color developer (otherwise you'd have some cast over the whole image, even on transparent parts). then again (on third thought) i know much to little about color processing to be sure :)

[mattias]

the image dye should only form in the color developer

yes, but the couplers are still there. it's the bleach that washes away the unactivated couplers along with the developed silver, that's how areas can become clear. it's not unlikely to me that color couplers are in fact brown!?!

/matt