Ah, not for the topic or purpose of toning but your explanation of the action of the different bleaches is a nugget of help for experimenting with 3383 as reversal, taking off from your notes about “alternative E-6” process. Merci! Hi, and thanks, Sarah too.
Sandy McLennan Port Sydney, Ontario, Canada > On Mar 2, 2022, at 10:43 PM, Robert Schaller <[email protected]> wrote: > > Hi Sarah, > > The classic re-halogenating bleach is the Ferricyanide bleach, which > contains Potassium Bromide. Ferricyanide bleach turns the black silver image > back into silver bromide, which then is what the toner acts on. Peroxide or > R9 Dichromate bleach remove the silver image altogether, leaving nothing for > the toner to act on. Though, if it was film you just shot, you could process > it as reversal, but just put it through the first developer and a peroxide > bleach, then tone it instead of (or in addition to, but before) the second > developer. I've never tried that, but it seems like there's room to explore > there! > > I meant that the peroxide eco-bleach wouldn't work as a replacement for > Ferricyanide bleach in toning an already finished image: the two bleaches are > both called bleaches, but they do entirely different things and are not > interchangeable! > > -Robert > >> On Mar 2, 2022, at 4:57 PM, Sarah Bliss <[email protected]> wrote: >> >> Thanks Robert and Morgan. >> >> Robert, I don’t know what re-halogenating bleach is. Can anyone else >> confirm Robert’s sense that that is what’s needed for toning, so that >> eco-bleach wouldn’t work. Ricardo or Dawn, any thoughts on this? >> >> Morgan, hi! and yes. I was only able to source 12% hydrogen peroxide. I >> diluted it to 9% and that has worked well with acetic acid when developing >> 7363. >> >> thanks, >> >> Sarah >> http://www.SarahBlissArt.com >> >>> From: Morgan Hoyle-Combs <[email protected]> >>> Subject: Re: [Frameworks] eco-bleach effective when tinting/toning? >>> Date: February 28, 2022 at 4:35:21 PM EST >>> To: Experimental Film Discussion List <[email protected]> >>> >>> Also, keep in mind that 9% peroxide is not available in the US. I was able >>> to get some acetic acid 12% peroxide which has to be diluted to 9%. I have >>> a formula for this and would like to try it out on some Plus-X of mine. >>> >>> Also, hi Sarah. >>> >>> M >>> On Monday, February 28, 2022, 02:16:32 PM EST, <[email protected]> >>> wrote: >>> >>> >>> I haven't tried using eco-bleach for toning, but my understanding is >>> that you need to use a re-halogenating bleach, and eco-bleach is not >>> that. It's more like the dichromate R9 bleach, and not what you need >>> for conventional toning. >>> >>> On 2022-02-28 11:38, Sarah Bliss wrote: >>> > Greetings friends and colleagues, >>> > >>> > When reversal developing 7363, I’ve been happily using an eco-bleach >>> > alternative based on Ricardo Leite’s recipe with some tweaks >>> > suggested by Dawn George. It works really well! Ingredients are 9% >>> > hydrogen peroxide and 5% acetic acid. >>> > >>> > Question: can this eco-bleach also effectively replace standard bleach >>> > when tinting/toning film, or does one need to use potassium >>> > ferricyanide + Potassium bromide for that? >>> > >>> > If yes, any data on how long to bleach the film before tinting or >>> > toning? >>> > >>> > thanks kindly, >>> > >>> > Sarah Bliss >>> > http://www.SarahBlissArt.com >>> >>> -- >>> Frameworks mailing list >>> [email protected] >>> https://mail.film-gallery.org/mailman/listinfo/frameworks_film-gallery.org >> >> -- >> Frameworks mailing list >> [email protected] >> https://mail.film-gallery.org/mailman/listinfo/frameworks_film-gallery.org > > -- > Frameworks mailing list > [email protected] > https://mail.film-gallery.org/mailman/listinfo/frameworks_film-gallery.org
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