Update to my earlier note: Have just reviewed notes I made at Phil Hoffman’s Film Farm this summer, where Ricardo Leite gave an organic processing workshop, and wanted to share here.
Ricardo has developed recipes to replace bleach with hugely less toxic alternatives for B&W reversal. See recipes and beautiful results here: http://www.filmlabs.org/docs/citric-hydrogen-peroxide-bleach.pdf He skips a clearing bath, with good results. Images are more contrasty and have a browner cast than if clearing bath is used. Amanda: Ricardo has found that salt works as a fixer, but it takes about 3 days of soaking. I also noted that Phil Hoffman doesn’t use fixer when processing B&W reversal, tho’ he keeps it in for negative. He says it may fade in 10 years or more, but so far his prints of less than 10 years don’t show fading. Sarah http://www.SarahBlissArt.com > On Aug 30, 2016, at 8:44 PM, Sarah Bliss <bl...@sarahblissart.com> wrote: > > Thanks Amanda, Scott, Pip, Sherman and David! I very much appreciate all the > info. > > I appreciate the links to Kodak’s info, Sherman. Unfortunately, I’m not able > to access further links from that page. Seems I need program membership, but > I don’t find info on what that is. > > Great to learn about onions as a temporary fix, Pip! > > Sounds like the most problematic chemicals are in bleach, fix, and hypoclear. > If spent chemicals are decanted and taken to a toxic waste site, how much > of a concern are the trace chemicals and silver in washes? Many folks seem > to think the impact on the septic system is not of major concern, which > leaves me with a concern about drinking water and general environmental > health. Searches online bring up opinions running the gamut, but we’ll be > drinking water that has these untreated chemicals in them. > > And do I have it right that installing a silver recovery system is as simple > as getting a special magnet that will attract the silver? > > > Sarah > http://www.SarahBlissArt.com <http://www.sarahblissart.com/> > >
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