[Frameworks] eco-bleach effective when tinting/toning? (Sarah Bliss)

[Sarah Bliss]

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 <mhoylecombs at yahoo.com>
> Subject: Re: [Frameworks] eco-bleach effective when tinting/toning?
> Date: February 28, 2022 at 4:35:21 PM EST
> To: Experimental Film Discussion List <frameworks at film-gallery.org>
> 
> 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, <robert at ontosmedia.com> 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 <http://www.sarahblissart.com/>
> 
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